New: MB&F Legacy Machine Perpetual Yellow Gold

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First launched in 2015, the MB&F LM Perpetual has been crafted since in red gold, platinum, white gold and titanium. Today MB&F announces a new Legacy Machine Perpetual in 18k yellow gold case with striking blue face. A limited edition of 25 pieces.

We covered the announcement in 2015 with a detailed hands-on review- see link below:

Essential Reading: MB&F Legacy Machine Perpetual Calendar Review

Press Release with commentary

The new LM Perpetual Calendar is exactly the same as we have reviewed with the exception of the following

  1. an deep blue blue main dial
  2. case crafted in yellow gold

The key perpetual calendar features remain the same. The clever mechanical processor remains, and the watch allows quick adjustment forwards and backwards of all indications. The calendar is also able to display the correct calendar indication with no skipping over of redundant days on months shorter than 31 days.

The photographs do suggest that the blue dial is very similar to the one used in the original hue chosen for the platinum edition. But closer examination reveals that the new blue in the yellow gold case is deeper than the pale blue found in the platinum.

Please do read our original review, as well as the release notes on the green dial version found here. Our conclusions drawn from our first review remain unchanged, and we are still in awe of the technical virtuosity as well as the physical beauty of the LM Perpetual, in yellow gold and the dark blue dial.

MB& F Legacy Machine Perpetual technical details

Legacy Machine Perpetual is available:

  • in platinum 950 with blue face (limited to 25 pieces);
  • in 18k red gold with grey face (limited to 25 pieces);
  • in 18k white gold with purple face (limited to 25 pieces);
  • in 18k white gold with dark grey face;
  • in grade 5 titanium with green face (limited to 50 pieces);
  • and now in 18k yellow gold with blue face (limited to 25 pieces)

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

Hours, minutes, day, date, month, retrograde leap year and power reserve indicators

Material: 18k 5N+ red gold, 18k white gold, 18k 3N yellow gold, platinum 950, grade 5 titanium.
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
Black, grey, brown or blue hand-stitched alligator strap with gold / platinum / titanium folding buckle matching case material.


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