Must agree, it is a beautiful watch. As noted above, not a lot of collector interest in these pieces, but that's of little relative value to your own enjoyment. Below from the Omega database:
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De VilleSaint Honoré
Gents' metal bracelet
Reference
BC
751.8358 E
International collection
1975
Movement
Type: Automatic (mechanical)
Caliber number: 662 / 663
Cal. 662
Created in 1975, 17 jewels
Cal. 663
Created in 1975, 24 jewels
Case
18K solid white gold
Case back
Press-in
Dial
With four diamond hour markers and "Dauphine" hands.
Diamonds: On dial
Crystal
Scratch-resistant sapphire
Bracelet
18K solid white gold (soldered)
Water resistance
No
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