Find your model
Orient watch batteries
Orient quartz answers live on the calibre (RMD00, Y121, VT821…) — not the RA- model code alone. Most Orient USA models today are mechanical; solar VS* movements are not CR/SR swaps.
Size chart
| Retail size | Also called | Tab colour | Approx. size | Notes |
|---|---|---|---|---|
| SR920SW / 371 | SR920SW | — | Ø 9.5 × 2.1 mm | Orient Cal. RMD00 / VX3WE / VT321 / JP6 — common quartz chronograph & dress |
| SR626SW / 377 | SR626SW | — | Ø 6.8 × 2.6 mm | Orient Cal. Y121 |
| SR621SW / 364 | SR621SW | — | Ø 6.8 × 2.15 mm | Orient Cal. VT821 / HE7 |
| SR521SW / 379 | SR521SW | — | Ø 5.8 × 2.15 mm | Orient Cal. HM5 |
| SR516SW / 317 | SR516SW | — | Ø 5.8 × 1.65 mm | Orient Cal. HM0 thin quartz |
Power types
| Generation / model | Battery | Replaceable? | Notes |
|---|---|---|---|
| Cal. RMD00 chronograph | 1 × SR920SW | Yes | RA-KV* examples — Epson EMAA20 lists SR920SW. |
| Cal. VX3WE (Sun & Moon quartz) | 1 × SR920SW | Yes | RA-KB* examples — Epson EMAA29 lists SR920SW. |
| Cal. Y121 | 1 × SR626SW | Yes | Epson EMAA27 table: QC Y121 → SR626SW. |
| Solar VS* / mechanical | Not a CR/SR swap | No | ~95% of Orient USA is mechanical. Solar VS42/VS75/VS752 use rechargeable cells — charge the dial; do not fit disposable SR/CR. |
Matching devices
Still not working?
Only after the correct calibre and cell: Orient often asks for specialist battery service for water resistance. If the watch is solar or mechanical, this resolver does not apply.