MB&F Horological Machines

Every MB&F Horological Machines reference takes a 20 mm watch strap: all 30 we measured.

Shop 20 mm

MB&F Horological Machines lug width by case size

30 references measured; 48 more have an integrated bracelet. Updated 2026-10-29.

CaseLug widthReferencesWatch strap attachmentFor example
45 mm20 mm2—100.RL.B, HM10-OW
47 mm20 mm10—31.RTL.B, 31.TL.TP, 33.RQTL.B
49 mm20 mm1—90.TL.RB
50 mm20 mm5—60.SL.B, 60.STGL.B, 60.STPL.B
52 mm20 mm2—55.CMT.B, 55.RL.B
54 mm20 mm4—40.RSL.R, 40.TSL.B, 40.TSYL
59 mm20 mm6—10.T41RL.O, 10.T41RL.R, 10.T41WBL.O

Every MB&F Horological 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 →