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Brand: Sartory BillardModel: SB06-12 and SB06-24Diameter: 41mmThickness: 9.5mmLug-to-lug: 47mmCase Material: Various, including titanium, link steel, gold, platinum, and tantalum (produced by Voutilainen & Cattin)Water Resistance: 50 metersStrap/Bracelet: Bespoke link to owners' requests link and size, hand-made by Scarlett Paris.

As mentioned the U50 is 41mm across 11.15mm thick and 47mm lug to lug. Lug width is 20mm and the U50 has drilled lugs woohoo! making strap changes nothing short of link a breeze. Inside that now smaller case and covered link by a solid link case back Sinn has fitted the U50 line with Sellita's SW300-1 a Swiss-made automatic movement with a date function. The SW300 is meant as direct competition for the higher-end expressions of ETA movements like the 2892-A2.