No. 72 of 90. Bronze. Swiss ETA. And every claim is stamped on the watch itself.

The Batiscafo Zero45 in bronze with the British Racing Green dial, from Andrei Troff's CENTVM workshop. You don't have to take my word for any of it — the case flank is engraved "30 BAR · no. 72/90", the display caseback reads "DIVING TOOL · SWISS ETA 2824 CALIBER · LIMITED EDITION", and the box card spells out the number, the movement and the dial colour. It's all in the photos.

Through the back you can watch the ETA 2824 running — 25 jewels, Swiss made, gold rotor.

30 BAR means 300 metres. The crown is protected by a hinged lever-lock bridge, the bezel turns one direction only, and the hour numerals are engraved right into the case flank instead of printed on a bezel insert.

Specs: 45mm bronze case, British Green dial, date at 3, Swiss ETA 2824 automatic, 30 BAR / 300m, single-directional bronze bezel, black embossed leather strap with signed bronze buckle. Boxed.

This variant lists at $719 new from the maker.

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Pre-owned; sold as shown in photos. The bronze carries real wear patina including verdigris in the crown-guard recesses — that is the nature of an unlacquered bronze case and it will keep changing.