Vintage Swiss Delbana automatic wristwatch, dating to around the early 1950s and powered by the highly regarded Felsa Cal. 690 Bidynator 17-jewel automatic movement.

The Felsa 690 belongs to the pioneering Bidynator family of early automatic movements, using bi-directional rotor winding and making this a particularly interesting vintage mechanical watch.

The watch features a striking black dial with large cream Arabic numerals, centre seconds, gold-plated case and classic early post-war styling.

The movement is signed Delbana Watch / Automatic / Bidynator and the calibre is marked Felsa 690.

The watch winds, sets and runs well.

Approximate case dimensions: 30mm wide × 39mm lug-to-lug
Aftermarket black leather strap
Maximum wrist size approx. 19cm

Condition is good vintage condition overall with age-related wear to the gold-plated case, crystal and dial consistent with a watch of this age. Please study the photographs carefully as these form part of the description.

The original “Waterproof” marking is retained as part of the period dial/case wording only; no modern water resistance is claimed.

A particularly attractive example with the much-collected early Felsa Bidynator automatic movement.