MB&F Legacy Machine Perpetual Stainless Steel

TECHNICAL SPECIFICATIONS

Engine

Fully integrated perpetual calendar developed for MB&F by Stephen McDonnell, featuring dial-side complication and mechanical processor system architecture with inbuilt safety mechanism. Manual winding with double mainspring barrels. Bespoke 14 mm balance wheel with traditional regulating screws visible on top of the movement. Superlative hand finishing throughout respecting 19th century style; internal bevel angles highlighting hand craft; polished bevels; Geneva waves; hand-made engravings.

Power reserve: 72 hours

Balance frequency: 18,000bph / 2.5Hz

Number of components: 581

Number of jewels: 41

Functions/indications: Hours, minutes, day, date, month, retrograde leap year and power reserve indicators

Case

Material: stainless steel.

Dimensions: 44 mm x 17.5 mm

Number of components: 69 components

Water resistance: 30 m / 90′ / 3 ATM

Sapphire crystals

Sapphire crystals on top and display back treated with anti-reflective coating on both faces.

Strap & buckle

Brown hand-stitched alligator strap with stainless steel folding buckle.