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MB&F Legacy Machines

Most MB&F Legacy Machines references take a 20 mm watch strap: 53 of 56.

Shop 20 mmShop 21 mmShop 24 mm

MB&F Legacy Machines lug width by case size

56 references measured; 31 more have an integrated bracelet. Updated 2026-10-29.

CaseLug widthReferencesWatch strap attachmentFor example
39 mm20 mm9—05.RSL.SB, 05.WSL.B, 05.WSL.B1
40 mm20 mm · 21 mm on 18—51.PL.W, 51.RL.W, 51.SL.MG
43 mm20 mm2—53.BTL.B, 53.RL.FS
44 mm20 mm · 24 mm on 237—01.PL.W, 01.RL.W, 01.SL.C

References that take a different watch strap

  • 51.SL.MB: 21 mm, not the 20 mm of most 40 mm cases
  • 02.PDL.BP: 24 mm, not the 20 mm of most 44 mm cases
  • 03.SL.S: 24 mm, not the 20 mm of most 44 mm cases

Every MB&F Legacy Machines reference

Other MB&F families

Inside each one the lug width often changes: it is the reference that decides.

All MB&F families → · Why the size changes inside a family →