The Seiko 5Y23-8170 is a watch model based on the 5Y23 movement.
Parts List
| 290W38ZN | crystal |
| 290W38ZN01 | crystal - crystal |
| 45EA2NA1 | crown |
| 45EA2NS1 | crown |
| FH2980B0 | case back gasket |
| FH2980B0A | case back gasket - case back gasket |
| 86565321 | crystal gasket - plastic gasket for crystal |
| 86179411 | bezel gasket - plastic gasket for bezel |
| Z1560J-LKS | band - link |
| Z1560L-LKG | band - link |
| Z1560J | band |
| ZQA23J | band |
| Z1560L | band |
| Z1560L-PB1 | clasp - parts for buckle/clasp |
| Z1560J-BK1S | clasp - clasp |
| Z1560J-PB1 | clasp - parts for buckle/clasp |
| Z1560L-BK1S | clasp - clasp |
| Z1560L-EPG | others - endpiece |
| 0351672 | others - winding stem |
| 82800261 | others - case ring |
| 0801722 | others - date dial |
| 0801723 | others - date dial |
| 0866561 | others - holding ring for dial |
| 5Y238170 | others - case back |
| 5Y23817061Z | others - case |
| 5Y23817098Z | others - case |
| 5Y23821WXB13 | others - dial |
| 5Y23821WXN14 | others - dial |
| 5Y23821WXS13 | others - dial |
| 5Y23822WXB13 | others - dial |
| 5Y23844WXS19 | others - dial |
| 5Y239 | others - machine code |
| 82352501 | others - bezel |
| 82352509 | others - bezel |
| A190CS | others - push pin |
| 0A0150B0A | others - crown and stem gasket |
| 13SC06LS | others - second hand |
| 13SC06LA | others - second hand |
| 89995390 | others - pusher spacer |
| 13SC04A2 | others - second hand |
| 2AB125L0BLA | others - minute hand |
| 2AB125L4BLA | others - minute hand |
| 2AB125L4BLS | others - minute hand |
| 12C52KBM | others - minute hand |
| 12C54KGM | others - minute hand |
| 1AB080L2BLA | others - hour hand |
| 12C52KBH | others - hour hand |
| 12CC4MGM | others - minute hand |
| 12C54KSM | others - minute hand |
| 12C54LSM | others - minute hand |
| 1AB080L4BLS | others - hour hand |
| 12C54LSH | others - hour hand |
| 1AB080L4BLA | others - hour hand |
| 1AB080L4BLD | others - hour hand |
| 12CC4MGH | others - hour hand |
| 12C54KSH | others - hour hand |
| 12C54KGH | others - hour hand |