I recently picked up an Omega Constellation Megaquartz 32 KHz (Caliber 1310) in what appears to be a solid 18k gold case, total weight is 32.3 grams. The case is hallmarked 18k, and the watch has a leather strap (likely aftermarket).
The watch seems smaller than the typical 36mm version - possibly a mid-size model.
I’m trying to gather more details about this specific version, including:
The actual case diameter and whether Omega made mid-size variants of the 1310
Estimated production year
Rarity or collectibility of the 18k gold versions
Value range (if working vs. non-working)
Any documentation, model references, or insight from collectors would be greatly appreciated!
Thanks in advance!