Calibre catalogue / Small calibre / K251D
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K251D fitting drawing (PDF)
Dimensions, stem height and hand fitting. Keyed to the base calibre, so sibling references share this drawing. Supplied for casing and fitting purposes only.
Small calibre
K251D
K Series
- —Small seconds
- —Automatic
- —Skeletonised
- —Open-heart
- —Exposed balance
| Specification | |
|---|---|
| Size | 23 mm (0.906 in) |
| Height | 5 mm (0.197 in) |
| Jewels | 26 |
| Frequency | 28,800 vph (4 Hz) |
| Power reserve | 40 h |
| Finish colour | Gunmetal |
Check dimensions against the fitting drawing before tooling a case.
Same base calibre
Variants
K100A
Small calibre
Small seconds · Automatic · Open-heart · Exposed balance
23 mm · 5 mm · 40 h
K150D
Small calibre
24-hour indicator · Day/night indicator · Small seconds · Automatic · Open-heart · Exposed balance
23 mm · 5 mm · 40 h
K151A
Small calibre
Small seconds · Automatic · Open-heart · Exposed balance
23 mm · 5 mm · 40 h
K151D
Small calibre
Small seconds · Automatic · Open-heart · Exposed balance
23 mm · 5 mm · 40 h
K200A
Small calibre
Small seconds · Automatic · Open-heart · Exposed balance
23 mm · 5 mm · 40 h
K250A
Small calibre
Small seconds · Automatic · Open-heart · Exposed balance
23 mm · 5 mm · 40 h