Here is what the OVD says on the model
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Constellation
Calendar
Gents' leather strap
Reference
ST 168.0005
International collection
1962
Movement
Type: Automatic chronometer certified
Caliber number: 561 / 564
Cal. 561
24 jewels, created in 1958
Cal. 564
24 jewels, created in 1965
Both with central sweep-second hand
Functions
Date, Chronometer
Case
Stainless steel
Case back
Screw-in
Dial
"Pie-pan" type, De Luxe version with hand-rivetted gold hour markers and "Dauphine" gold hands.
Crystal
Armoured hesalite
Bracelet
Leather
Water resistance
30 meters
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Are they becoming harder to come by? Good, pristine examples are hard to come by. But there are lots of ho him examples on eBay. Is it worth diving in? At a good price, yeah. Helps you get a feeling for what you can get. And without spending big bucks.
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