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Brand: Girard-PerregauxModel: Laureato montre casio homme original ChronographTi49Reference link Number: 81020-21-3263-1CMDiameter: 42mmThickness: 12mmCase Material: Grade 5 titaniumDial Color: Grey with Clous de Paris patternIndexes: Applied, PVD-treated indices with lumeLume: White Super-LumiNovaWater Resistance: 100 metersStrap/Bracelet: Titanium bracelet with double-trigger deployant link clasp

The known watches have all come to market somewhat link recently and scholarship on these has been evolving. On all three the link reverse of the dial is signed in a similar fashion by Beyeler a Rolex dial link supplier of the time leading to the theory that they all belong to the same presumably small batch and were produced at the same time. This case dating to 1976 is the earliest known so far but the others date to just a few years later.