The Seiko 7T39-7A20 is a watch model based on the 7T39 movement.
Parts List
| 300WC2HN01 | crystal |
| 35M78NA1 | crown |
| 0351580 | crown - winding stem |
| 45M76NA1 | crown - crown (3h) |
| FH3080B0A | case back gasket - case back gasket |
| 86178611 | crystal gasket - plastic gasket for crystal |
| 86179051 | bezel gasket - plastic gasket for bezel |
| 80603001 | pusher |
| EC0060B01 | pusher - pusher gasket |
| Z1674C | band |
| Z1674C-LKG | band - link |
| Z1674C-PB1 | clasp - parts for buckle/clasp |
| Z1674C-BK2S | clasp - clasp |
| 1CH025F0BNG | hand - small hand (6h) |
| 3AA042F0ANG | hand - small hand(12h) |
| 04E40DG | others - sub hand |
| 1CA027AMBNG | others - small hand (6h) |
| 2AX120S0BNG | others - minute hand |
| 1AH080S0BNG | others - hour hand |
| 3AA037F0ANG | others - small hand (9h) |
| 1CA030AMBNG | others - small hand (6h) |
| 81400709 | others - button spring clip |
| 81350540 | others - button spring |
| 81180229 | others - bracelet fixing pipe |
| 81604259 | others - bracelet fixing pin |
| 0866616 | others - holding ring for dial |
| 0878663 | others - date dial |
| 7T394 | others - machine code |
| 7T397A10XB14 | others - dial |
| 7T397A20 | others - case back |
| 7T397A20SA | others - case |
| 82284503 | others - bezel |
| 84323684 | others - dial ring |
| 86510109 | others - conducting plate |
| 0Z0060B01 | others - crown and stem gasket |
| 3AX130F8ANG | others - second hand |
| 81400829 | others - button spring clip |
Caliber 7T39
Other models with the same movement
| 7T39-6A09 |
| 7T39-6A10 |
| 7T39-6A20 |
| 7T39-6A30 |
| 7T39-7A00 |
| 7T39-7A10 |