Seiko Watch Reference 1950s/1960s

In the early 1950s, Seiko gradually introduced 5-digit case codes, sometimes preceded by the letter ‘J’. This coding system remained the standard for Seiko watches until 1964, covering a period of just over a decade.

The first two digits of the code approximately indicate the dial size, expressed in lignes. When the first two digits are preceded by the letter ‘J’, it means that half a ligne should be added to the indicated value (for example, J12 corresponds to 12.5 lignes). The remaining three digits represent a progressive number, starting from 000, then 001, 002, and so on.

Seiko J14xxx

Case CodeModelsMaterials
J14000Unique
Marvel
Laurel
Crown
Stainless Steel,
Front EGP 20 Microns Back Stainless Steel
J14001Unique
Marvel
Laurel
Stainless Steel
J14002UniqueStainless Steel
J14003Automatic14K Gold Filled
J14004Marvel
Cronos
Stainless Steel,
Front EGP 20 Microns Back Stainless Steel
J14005MarvelFront 14K Gold Filled Steel Back
J14006CronosStainless Steel
J14007MarvelFront 14K Gold Filled Steel Back
J14008MarvelStainless Steel
J14009AutomaticStainless Steel
J14010MarvelStainless Steel
J14011MarvelStainless Steel
J14012Marvel
Crown
Stainless Steel,
All EGP 20 Microns
J14013CronosStainless Steel
J14014MarvelStainless Steel
J14015AutomaticStainless Steel,
14K Gold Filled
J14016CronosStainless Steel
J14017CronosStainless Steel
J14018Cronos
Marvel
Stainless Steel,
K18
J14019MarvelStainless Steel
J14020Marvel
Laurel
Stainless Steel
J14021Cronos14K Gold Filled
J14022Marvel
Laurel
Crown
Stainless Steel,
Front EGP 20 Microns Back Stainless Steel
J14023CronosStainless Steel
J14024??
J14025??
J14026MarvelFront 14K Gold Filled Steel Back
J14027MarvelFront 14K Gold Filled Steel Back
J14028CronosStainless Steel,
Front 14K GF
J14029CronosStainless Steel
J14030AutomaticStainless Steel
J14031MarvelFront EGP 20 Microns Back Stainless Steel
J14032CrownStainless Steel
J14033??
J14034Cronos18K
J14035CrownStainless Steel
J14036CrownStainless Steel,
Front EGP 20 Microns Back Stainless Steel
J14037Super
Cronos
Champion
Stainless Steel Back,
Stainless Steel,
Front EGP 20 Microns
J14038Lord MarvelStainless Steel
J14039Lord Marvel14K Gold Filled
J14040CrownStainless Steel,
Front 14K GF
J14041??
J14042??
J14043??
J14044MarvelFront EGP 20 Microns Back Stainless Steel
J14045LaurelStainless Steel
J14046??
J14047??
J14048CronosStainless Steel,
Front 14K GF
J14049??
J14050Lord Marvel18K Gold
J14051??
J14052??
J14053??
J14054Gyro MarvelStainless Steel,
Back Stainless Steel Front EGP 20 Microns
J14055??
J14056??
J14057Goldfeather14K Gold Filled 80 Microns
J14058??
J14059??
J14060Goldfeather?
J14061CronosStainless Steel,
14K Gold Filled
J14062Gyro MarvelStainless Steel,
Back Stainless Steel Front EGP 20 Microns
J14063??
J14064SeikomaticStainless Steel,
All EGP 20 Microns
J14065Crown
Laurel
Stainless Steel,
Front EGP 20 Microns Back Stainless Steel
J14066CrownStainless Steel,
Front EGP 20 Microns
J14067LinerStainless Steel
J14068Lord Marvel14K Gold Filled
J14069LinerAll Gold Filled
J14070Grand Seiko Chronometer14K Gold Filled
J14071Crown?
J14072Crown?
J14073Gyro Marvel?
J14074SeikomaticStainless Steel,
EGP 20 Microns Back Gold Filled
J14075SeikomaticStainless Steel,
EGP 20 Microns Back Gold Filled
J14076??
J14077CronosStainless Steel,
AEGP
J14078Goldfeather14K Gold Filled
J14079CrownFront EGP 20 Microns Back Stainless Steel
J14080CrownFront EGP 20 Microns Back Stainless Steel
J14081??
J14082ChampionStainless Steel
J14083Cronos?
J14084CrownFront EGP 20 Microns Back Stainless Steel
J14085CrownStainless Steel,
EGP 20 Microns Back Gold Filled
J14086LinerStainless Steel
J14087SportsmanStainless Steel,
EGP 20 Microns Back Stainless Steel
J14088ChampionStainless Steel,
Front EGP 20 Microns
J14089CrownStainless Steel,
All EGP 20 Microns
J14090ChampionStainless Steel,
Front EGP 20 Microns
J14091CrownStainless Steel,
Front EGP 20 Microns Back Stainless Steel
J14092SportsmanStainless Steel,
EGP 20 Microns Back Gold Filled
J14093??
J14094SeikomaticStainless Steel,
Front EGP 20 Microns
J14095CrownStainless Steel
J14096CrownStainless Steel,
Front EGP 20 Microns Back Stainless Steel
J14097ChampionStainless Steel
J14098ChampionStainless Steel,
Front EGP 20 Microns
J14099SeikomaticStainless Steel,
All EGP 20 Microns,
Front EGP 20 Microns Back Stainless Steel
J14100Crown SpecialAll Gold Filled 80 Microns
J14101Cronos Self Dater?
J14102King SeikoStainless Steel,
14K Gold Filled 100 Microns
J14103SportsmaticStainless Steel,
Front EGP 20 Microns
J14104ChampionStainless Steel,
Front EGP 20 Microns
J14105ChampionStainless Steel,
Front EGP 20 Microns
J14106ChampionStainless Steel,
Front EGP 20 Microns
J14107Cronos (Special Finish)Stainless Steel
J14108Motorist (Harmony)EGP 20 Microns Back Stainless Steel
J14109UniqueBack Stainless Steel EGP
J14110Unique
Laurel
Cronos
Stainless Steel,
Back Stainless Steel Front EGP

Seiko 14xxx

Case CodeModelsMaterials
14000??
14001
14002??
14003??
14004SuperBack Stainless Steel
14005??
14006??
14007??
14008??
14009??
14010SuperFront 14K Gold Filled Steel Back
14011??
14012??
14013??
14014??
14015Automatic14K Gold Filled
14016??
14017??
14018??
14019MarvelStainless Steel
14020MarvelStainless Steel
14021MarvelK14 Gold Filled,
Front 14K Gold Filled Steel Back
14022MarvelFront 14K Gold Filled Steel Back
14023??
14024??
14025MarvelStainless Steel
14026AutomaticStainless Steel
14027??
14028??
14029??
14030??
14031??
14032??
14033??
14034??
14035MarvelStainless Steel
14036??
14037??
14038??
14039UniqueStainless Steel
14040Automatic14K Gold Filled
14041Marvel
Laurel
Laurel Alpinist
Stainless Steel
14042Unique?
14043AutomaticStainless Steel
14044??
14045MarvelFront 14K Gold Filled Steel Back
14046CronosStainless Steel
14047??
14048??
14049??
14050??
14051??
14052MarvelFront 14K Gold Filled Stainless Back
14053Marvel?
14054??
14055??
14056Lord MarvelStainless Steel
14057Lord Marvel14K Gold Filled
14058??
14059??
14060AutomaticEGP 20 Microns,
Stainless Steel
14061??
14062??
14063??
14064??
14065??
14066??
14067Automatic18K
14068??
14069??
14070??
14071??
14072??
14073??
14074??
14075??
14076??
14077??
14078Gyro MarvelStainless Steel
14079??
14080??
14081??
14082??
14083??
14084??
14085??
14086??
14087??
14088??
14089??
14090LinerStainless Steel
14091SportsmanSTP

Seiko J13xxx

Case CodeModelsMaterials
J13000New10
Super
Unique
Marvel
Stainless Steel,
Back Stainless Steel
J13001New10
Super
Unique
Marvel
Stainless Steel,
Back Stainless Steel
J13002New10
Super
Unique
Marvel
Stainless Steel,
Back Stainless Steel
J13003Super
Unique
Marvel
Laurel
Stainless Steel
J13004??
J13005Super
Unique
Marvel
Stainless Steel,
Back Stainless Steel
J13006MarvelK18
J13007MarvelStainless Steel
J13008??
J13009Unique
Marvel
Stainless Steel
J13010Super
Marvel
Front 14K Gold Filled Steel Back
J13011??
J13012Super
Unique
Marvel
Stainless Steel,
Back Stainless Steel
J13013Marvel
Laurel
Sportsman
Stainless Steel
J13014Unique
Marvel
Stainless Steel
J13015UniqueStainless Steel
J13016Super
Marvel
Laurel
Back Stainless Steel,
Stainless Steel
J13017Marvel14K Gold Filled
J13018??
J13019Super
Unique
Marvel
Stainless Steel
J13020Unique
Marvel
Stainless Steel
J13021MarvelBack Stainless Steel
J13022MarvelStainless Steel
J13023Super
Unique
Marvel
Stainless Steel Back,
Stainless Steel
J13024MarvelStainless Steel
J13025MarvelStainless Steel
J13026??
J13027??
J13028Cronos (Water Proof)Stainless Steel
J13029Laurel (Rain Proof)Stainless Steel
J13030??
J13031SportsmanStainless Steel,
Front EGP 20 Microns Back Stainless Steel
J13032Cronos (Water Proof)Stainless Steel
J13033Champion Alpinist (Rain Proof)Stainless Steel
J13034Seikomatic (Blue Yacht)Stainless Steel
J13035Sportsman (Dolphin)Stainless Steel
J13036??
J13037??
J13038??
J13039??
J13040Champion (Water Proof 30)Stainless Steel,
EGP 20 Microns
J13041Crown (Water Proof)Stainless Steel
J13042Cronos (Water Proof)
Champion (Water Proof)
All Stainless Steel,
EGP 20 Microns Back Steel
J13043Champion Alpinist (Water Proof)Stainless Steel
J13044Seikomatic (Water Proof 30)Stainless Steel
J13045Sportsmatic (Water Proof 30)Stainless Steel
J13046Cronos (Water Proof 50)Stainless Steel
J13047Champion (Water Proof)Stainless Steel
J13048Fairway (Water Proof 30)EGP
STP
J13049Champion Alpinist (Water Proof)Stainless Steel
J13050Champion Calendar (Water Proof)Stainless Steel
J13051??
J13052Sportsman (Water Proof)Stainless Steel
J13053??
J13054??
J13055Sportsmatic (Water Proof)Stainless Steel,
EGP 20 Microns Back Stainless Steel
J13056??
J13057??
J13058??
J13059Seikomatic Self Dater (Water Proof 30)Stainless Steel
J13060Seikomatic Self Dater (Water Proof 50)Stainless Steel
J13061Seikomatic Self DaterStainless Steel
J13062Seikomatic Self DaterStainless Steel
J13063??
J13064??
J13065??
J13066C22 Sea LionStainless Steel
J13067C22 Sea LionStainless Steel
J13068??
J13069??
J13070??
J13071??
J13072??
J13073??
J13074??
J13075??
J13076Champion (Water Proof 30)All Stainless Steel
J13077Champion (Water Proof 30)Stainless Steel,
EGP 20 Microns Back Stainless Steel
J13078Champion Calendar (Water Proof)Stainless Steel
J13079Champion Alpinist (Water Proof)Stainless Steel
J13080Seikomatic Weekdater (Water Proof 30)Stainless Steel
J13081Sportsmatic 5 (Water Proof)Back Stainless Steel Front EGP,
STP
J13082Sportsman (Water Proof)Stainless Steel
J13083Seikomatic Self Dater (Water Proof 70)Gold Cap 260 Microns
J13084??
J13085Seikomatic Self Dater (Water Proof 50)Stainless Steel
J13086C22 Sea Lion (Champion)Stainless Steel
J13087C22 Sea Lion (Champion)Stainless Steel
J13088M55 Sea Lion (Seikomatic)Stainless Steel

Seiko 13xxx

Case CodeModelsMaterials
13000??
13001New10Stainless Steel Back
13002??
13003??
13004??
13005SuperStainless Steel
13006??
13007??
13008??
13009??
13010SuperK18
13011SuperStainless Steel
13012??
13013??
13014??
13015??
13016??
13017SuperTop 14k Gold Filled
13018??
13019??
13020??
13021??
13022??
13023??
13024Super
Marvel
Back Stainless Steel,
Stainless Steel
13025Super
Unique
Back Stainless Steel
13026Super Self DatorStainless Steel Back,
Back Stainless Steel
13027??
13028??
13029??
13030??
13031??
13032??
13033SuperStainless Steel
13034??
13035??
13036??
13037??
13038??
13039SuperStainless Steel
13040??
13041SuperStainless Steel
13042??
13043AutomaticStainless Steel
13044??
13045??
13046??
13047New10
Marvel
Stainless Steel Back,
Stainless Steel
13048??
13049??
13050??
13051??
13052??
13053??
13054??
13055??
13056??
13057??
13058??
13059??
13060??
13061??
13062??
13063??
13064??
13065??
13066??
13067??
13068??
13069??
13070??
13071??
13072??
13073??
13074??
13075??
13076??
13077??
13078??
13079??
13080??
13081??
13082??
13083??
13084??
13085??
13086??
13087??
13088??

Seiko J12xxx

Case CodeModelsMaterials
J12000??
J12001??
J12002??
J12003??
J12004??
J12005??
J12006??
J12007??
J12008??
J12009??
J12010??
J12011??
J12012??
J12013??
J12014??
J12015??
J12016??
J12017??
J12018??
J12019??
J12020??
J12021??
J12022??
J12023??
J12024??
J12025??
J12026??
J12027??
J12028??
J12029??
J12030??
J12031??
J12032Seikomatic SilverWave (Water Proof 30)Stainless Steel
J12033??
J12034??
J12035??
J12036??
J12037??
J12038??
J12039??
J12040??
J12041??
J12042??
J12043??
J12044??
J12045??
J12046??
J12047??
J12048??
J12049??
J12050??
J12051??
J12052??
J12053??
J12054??
J12055??
J12056??
J12057??
J12058??
J12059??
J12060??
J12061??
J12062??
J12063??
J12064??
J12065??
J12066??
J12067??
J12068??
J12069??
J12070??
J12071??
J12072??
J12073??
J12074??
J12075??
J12076??
J12077??
J12078??
J12079??
J12080LinerStainless Steel
J12081GoldfeatherEGP 20 Microns
J12082Seikomatic SilverWave (Water Proof 50)Stainless Steel
J12083??
J12084Disney TimeBack Stainless Steel
J12085??
J12086??
J12087??
J12088??