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 Automatic mechanical movement
K Series
K251D has the following listed functions: Small seconds · Automatic · Skeletonised · Open-heart · Exposed balance. Its documented specifications are 23 mm diameter; 5 mm height; 26 jewels; 28,800 vph (4 Hz); 40 h power reserve; finish colour: Gunmetal.
- —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.
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How to order
Prices on request. Samples available. Made to order, approximately 8–10 weeks. Finishing by Memorigin optional.
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
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