Reference: 03.SL.S
Features
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 handcraft, polished bevels, Geneva waves, and hand-made engravings.
• Power reserve: 72 hours
• Balance frequency: 18,000 bph / 2.5 Hz
• Number of components: 581
• Number of jewels: 41
Functions/Indications
• Hours, minutes
• Day, date, month
• Retrograde leap year
• Power reserve indicators
Case
• Material: 18k 5N+ red gold, 18k white gold, 18k 3N yellow gold, platinum 950, grade 5 titanium, palladium 950, or stainless steel.
• Dimensions: 44 mm x 17.5 mm
• Number of components: 69
• 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
• Black, grey, brown, or blue hand-stitched alligator strap with gold, platinum, titanium, or stainless steel folding buckle matching case material.Features
Engine
• Fully integrated perpetual calendar developed for MB&F by Stephen McDonnell.
• Dial-side complication with mechanical processor system architecture and 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 inspired by 19th-century craftsmanship:
• Internal bevel angles highlight handcraft.
• Polished bevels, Geneva waves, and hand-made engravings.
• Power reserve: 72 hours
• Balance frequency: 18,000 bph / 2.5 Hz
• Number of components: 581
• Number of jewels: 41
Functions/Indications
• Hours, minutes
• Day, date, month
• Retrograde leap year
• Power reserve indicators
Case
• Material:
• 18k 5N+ red gold
• 18k white gold
• 18k 3N yellow gold
• Platinum 950
• Grade 5 titanium
• Palladium 950
• Stainless steel
• Dimensions: 44 mm x 17.5 mm
• Number of components: 69
• Water resistance: 30 m / 90’ / 3 ATM
Strap & Buckle
• Hand-stitched alligator strap in black, grey, brown, or blue.
• Folding buckle in gold, platinum, titanium, or stainless steel to match case material.