The Seiko 5Y23-8270 is a watch model based on the 5Y23 movement.
Parts List
| 290W36GN | crystal |
| 290W36GN00 | crystal |
| 35M82NA1 | crown - crown |
| 35M82NS1 | crown - crown |
| FH2981B01 | case back gasket - case back gasket |
| FH2981B0 | case back gasket |
| 86574980 | crystal gasket - crystal gasket |
| 86574981 | crystal gasket |
| 86179411 | bezel gasket - plastic gasket for bezel |
| B1771J | band |
| B1771S | band |
| B1771C | band - metal band |
| B1771C-LKG | band - link |
| B1771G-LKG | band - link |
| B1771J-LKS | band - link |
| B1771K-LKG | band - link |
| B1771L-LKG | band - link |
| B1771S-LKS | band - link |
| B1771K | band |
| B1771L | band |
| B1771G | band |
| B1771C-BK1S | clasp - clasp |
| B1771G-PB1 | clasp - parts for buckle/clasp |
| B1771J-BK1S | clasp - clasp |
| B1771C-PB1 | clasp - parts for buckle/clasp |
| B1771G-BK1G | clasp - clasp |
| B1771S-PB1 | clasp - parts for buckle/clasp |
| B1771L-PB1 | clasp - parts for buckle/clasp |
| B1771S-BK1S | clasp - clasp |
| B1771K-PB1 | clasp - parts for buckle/clasp |
| B1771L-BK1S | clasp - clasp |
| B1771J-PB1 | clasp - parts for buckle/clasp |
| B1771K-BK1G | clasp - clasp |
| A120BS | others - push pin (for lb) |
| 0801774 | others - date dial |
| 0801777 | others - date dial |
| 0866559 | others - holding ring for dial |
| 0878523 | others - date dial |
| 5Y238270 | others - case back |
| 5Y23827061 | others - case |
| 5Y23827061Z | others - case |
| 5Y23827075 | others - case |
| 5Y23827075Z | others - case |
| 5Y23827098 | others - case |
| 5Y23827098Z | others - case |
| 5Y23846LXB13 | others - dial |
| 5Y23846LXG14 | others - dial |
| 5Y23846LXS14 | others - dial |
| 5Y23846WXB13 | others - dial |
| 5Y23846WXG14 | others - dial |
| 5Y23846WXS14 | others - dial |
| 5Y239 | others - machine code |
| 82354401 | others - bezel |
| 82354409 | others - bezel |
| 0351670 | others - winding stem |
| 82800261 | others - case ring |
| 13SC04A2 | others - second hand |
| 13SC04ES | others - second hand |
| 0Z0060B01 | others - crown and stem gasket |
| 12CB4LSM | others - minute hand |
| 12CB4LGM | others - minute hand |
| 12CB4LSH | others - hour hand |
| 12CB4LGH | others - hour hand |