The Seiko 3Y03-0A50 is a watch model based on the 3Y03 movement.
Parts List
| 200W26LN01 | crystal - crystal |
| 200W26LN | crystal |
| 30MB6NS1 | crown |
| 30MB6NA1 | crown |
| 0A1900B01 | case back gasket - gasket |
| EZ0035B0 | case back gasket |
| 86580100 | crystal gasket - plastic gasket for crystal |
| 86179140 | bezel gasket - plastic gasket for bezel |
| B5535C | band - metal band |
| B5535C-LKG | band - link |
| B5535G | band - metal band |
| B5535G-LKG | band - link |
| Z5327J | band |
| BJJ60K | band |
| B5535L | band - band |
| B5535L-LKG | band - link |
| B5535S | band - metal band |
| BJA48K | band - leather band |
| BJJ59G | band - leather band |
| BJJ59K | band - leather band |
| BJJ60G | band - leather band |
| Z5327C | band - metal band |
| B5535K | band - metal band |
| B5535K-LKG | band - link |
| Z5327C-LKG | band - link |
| Z5327G | band - metal band |
| Z5327G-LKG | band - link |
| Z5327K | band - metal band |
| Z5327K-LKG | band - link |
| Z5327L | band - metal band |
| Z5327L-LKG | band - link |
| Z5327S | band - metal band |
| B5535J | band |
| B5535G-PB1 | clasp - parts for buckle/clasp |
| B5535G-BK1G | clasp - clasp |
| B5535C-PB1 | clasp - parts for buckle/clasp |
| B5535C-BK1S | clasp - clasp |
| B5535L-BK1S | clasp - buckle |
| B5535L-PB1 | clasp - parts for buckle |
| Z5327L-PB1 | clasp - parts for buckle/clasp |
| Z5327L-BK1S | clasp - clasp |
| Z5327K-PB1 | clasp - parts for buckle/clasp |
| Z5327K-BK1G | clasp - clasp |
| Z5327G-PB1 | clasp - parts for buckle/clasp |
| Z5327G-BK1G | clasp - clasp |
| Z5327C-PB1 | clasp - parts for buckle/clasp |
| B5535K-PB1 | clasp - parts for buckle/clasp |
| B5535K-BK1G | clasp - clasp |
| Z5327C-BK1S | clasp - clasp |
| 0801796 | others - date dial |
| 0866553 | others - holding ring for dial |
| 0878505 | others - date dial |
| 0878533 | others - date dial |
| 3Y030A50 | others - case back |
| 3Y030A5061 | others - case |
| 3Y030A5061A | others - case |
| 3Y030A5075 | others - case |
| 3Y030A5075A | others - case |
| 3Y030A5098 | others - case |
| 3Y030A5098A | others - case |
| 3Y030A7LXG14 | others - dial |
| 3Y030A7LXN14 | others - dial |
| 3Y030A7LXS13 | others - dial |
| 3Y030A7WXG14 | others - dial |
| 3Y030A7WXN14 | others - dial |
| 3Y030A7WXS14 | others - dial |
| 3Y030A8LXS14 | others - dial |
| 3Y030A8WXS14 | others - dial |
| 3Y030A8WXS23 | others - dial |
| 3Y030A90XS19 | others - dial |
| 3Y030A98XS19 | others - dial |
| 3Y030B00X913 | others - dial |
| 3Y030B00X924 | others - dial |
| 3Y030B08X913 | others - dial |
| 3Y030B08X924 | others - dial |
| 3Y037 | others - machine code |
| 82350661 | others - bezel |
| 82350669 | others - bezel |
| 82801600 | others - case ring |
| A130BS | others - push pin |
| 0351546 | others - winding stem |
| EZ0035B01 | others - crown and stem gasket |
| 09SC04NS | others - second hand |
| 09SC04NG | others - second hand |
| 08TG2LSM | others - minute hand |
| 08T26NAM | others - minute hand |
| 08TG4KSM | others - minute hand |
| 08TG2LGM | others - minute hand |
| 08TA0A1H | others - hour hand |
| 08TA0A1M | others - minute hand |
| 08T26N1M | others - minute hand |
| 08TG4KGM | others - minute hand |
| 08TG2LSH | others - hour hand |
| 08TF8NSH | others - hour hand |
| 08TG4KSH | others - hour hand |
| 08TG2LGH | others - hour hand |
| 08TF8NGH | others - hour hand |
| 08TG4KGH | others - hour hand |