| Manufacturer | Landeron |
| Caliber Number | 4750 |
| Type | Electric |
| Lignes | 11.5”’ |
| Jewels | 12 |
| Vibrations Per Hour | 18,000 bph |
| Anti-Shock Device | Incabloc |
| Functions | Central hours; central minutes; central sweeping seconds |
| Country of Manufacture | Switzerland |
| Known Models | Wittnauer Electro-Chron, Bucherer Electric, Enicar Electric, Nivada Grenchen Electric (Add your watch to the comments below…) |
The Landeron caliber 4750 was the first Swiss made electric watch movement. This caliber was launched circa 1960 ~ 1961 and is found in a wide variety of vintage electric watches from the 1960s. There is a similar Landeron caliber 4751 with 13 jewels.
The original battery was numbered WD-4 or WD-5 and contained mercury. For that reason, the battery is no longer available. Some folks use smaller diameter modern batteries with an adapter ring. If you have experience with this, please share in the comments below.
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Recent Comments
hello, does anyone know if it is 1:1 clone of the 6498/6497 in terms of…
Glad you think so. Thank you for the comment!
Informative. Thank you!
Mixed experience with this caliber, I have 2 watches with it, the first one is…
NH35 rotors and cases will fit an NH70. The only NHxx I can think of…
Also in the Ollech & Wajs M52
I really want to buy a custom rotor for this and it is way easier…