anon438
429
Up Side down, Down Side up - rare Ebay find - 1930's Vacheron Constantin, rectangular, hinged case, with integrated folding clasp
Sometimes it's possible to find something quite rare at Ebay.
Another technical dead end of development history.
But the watch has certainly collecting qualities. Probably very small production lot.
Case modified and degraded, assembled wrongly up side down.
For reference see 'The World of VC', 1992, by Lambelet & Coen, page 392: