Rolex 3135

Disclaimer

An approximation of the Rolex 3135 layout from public drawings and photographs, not a manufacturer-accurate replica. 28,800 vph (4 Hz), 31 jewels, Ø 28.50 mm (28.10 mm casing), 6.00 mm height including the automatic and date mechanisms, the free-sprung annular balance with two pairs of Microstella nuts, the Breguet hairspring, the balance bridge adjustable in height by two nuts, the date with rapid corrector and stop-seconds are Rolex technical-sheet figures. Bidirectional winding, the jewelled-axle two-piece rotor, the two red reversing wheels, the Swiss lever escapement and the power reserve come from watch press and reference databases; Rolex’s sheet gives no power reserve, and sources split between about 48 h (used here) and 50 h. The orientation follows Rolex’s caseback render (balance at about 6, crown at 3: medium confidence). Tooth counts, wheel sizes, the barrel position, the train layout, the bridge outlines hidden under the automatic bridge and rotor, the seconds drive and the dial side are an approximation; the bridges are shown grained because no source names a decoration. Parts are drawn larger than life for legibility. The escapement motion is a kinematic model, not a physics simulation.