Fine Swiss stainless keyless lever watch with chronograph Circa 1925

Stainless steel lever with tachometer scale
–
A fine and rare Swiss, stainless steel, keyless watch with chronograph, register and tachometer scale, circa 1925. A polished case, curved bezel, snap-on back cover.  Two-tone brushed silver dial, black Breguet numerals, outer minutes and fifths of a second division, 30-minute register dial at 12, subsidiary seconds at 6, outer tachometer graduation. Blued steel Breguet hands. A rhodium-plated movement, 17 jewels, straight-line lever escapement, cut bimetallic compensation balance, Breguet balance spring, index regulator. Dial, case, and movement signed.
–
Diameter: 48,2 mm
–
Signed: Rolex  Swiss (retailed by C. Bucherer)