Ball Watch Official Railroad Watch
Every Ball Watch Official Railroad Watch reference takes a 20 mm watch strap: all 4 we measured.
Ball Watch Official Railroad Watch lug width by case size
4 references measured. Updated 2026-10-29.
| Case | Lug width | References | Watch strap attachment | For example |
|---|---|---|---|---|
| 40 mm | 20 mm | 1 | — | NM3888D-PG-LCJ-WH |
| 44 mm | 20 mm | 1 | — | GM2086C-L2-BK |
| 46 mm | 20 mm | 2 | — | NM1080C-L2-BK, NM1080C-S2-BK |
Other Ball Watch families
Inside each one the lug width often changes: it is the reference that decides.
- Engineer II 25
- Engineer 20
- Fireman 17
- Roadmaster 15
- Engineer Hydrocarbon 9
- Engineer Master II 9
- Engineer M 8
All Ball Watch families → · Why the size changes inside a family →