The Seiko Y187-8A40 is a watch model based on the Y187 movement.
Parts List
| 290W28GN00 | crystal |
| 45M76NF1 | crown - crown |
| 0351580 | crown - winding stem |
| FH3181B01 | case back gasket - case back gasket |
| 86565320 | crystal gasket - plastic gasket for crystal |
| 80616961 | pusher |
| EC0060B01 | pusher - pusher gasket |
| 048ZAK | band |
| 03E56FB | hand - sub hand |
| 03E56FL | hand - sub hand |
| 03Y50FBH | hand - hour hand |
| 05Y08FBH | hand - small hand (9h) |
| 05Y08FLH | hand - small hand (9h) |
| 11C56LGM | others - minute hand |
| 11C56LGH | others - hour hand |
| 03E22XG | others - (hand(special)) |
| 81350540 | others - button spring |
| 81400900 | others - button spring clip |
| 0866602 | others - holding ring for dial |
| 0878527 | others - date dial |
| A200BS | others - push pin |
| Y1876 | others - machine code |
| Y1878A407S | others - case |
| Y1878A40TE | others - case |
| Y1878A7LX914 | others - dial |
| Y1878A7LX924 | others - dial |
| Y1878A7LXG14 | others - dial |
| Y1878A80X919 | others - dial |
| Y1878A90X919 | others - dial |
| 13SC06LA | others - second hand |
| 11CT8FGH | others - hour hand |
| 13SC04AL | others - second hand |
| 0Z0060B01 | others - crown and stem gasket |
| 11CR0FGM | others - minute hand |
| 11CR0FGH | others - hour hand |
| 13SC06PE | others - second hand |
| 1AD075SNBAA | others - hour hand |
Other models with the same movement