Omega Speedmaster Lug Widths

 Reference Number Model Lug Width
304.XX.XX.XX.XX.XXX Speedmaster Moonphase 21mm
311.30.44.50.01.001 Speedmaster Professional 22mm
311.XX.XX.XX.XX.XXX Speedmaster Moonwatch 21mm
3XX.XX.XX.XX.XX.XXX Dark Side Of The Moon 21mm
3113.XX.XX/3123.XX.XX Speedmaster Date 18mm
315X.XX.XX/355X.XX.XX Broad Arrow 20mm
321.XX.42.XX.XX.XXX Broad Arrow 20mm
321.XX.44.XX.XX.XXX Broad Arrow 21mm
329.XX.XX.XX.XX.XXX Speedmaster Chronoscope 21mm
358X.XX.XX Broad Arrow 21mm
365X.XX.XX/385X.XX.XX Broad Arrow 20mm
321.10.XX.XX.XX.XXX Speedmaster Olympic 20mm
321.30.44.XX.XX.XXX Speedmaster Olympic 22mm
321.32.44.XX.XX.XXX Speedmaster Olympic 21mm
321.30.94.XX.XX.XXX Speedmaster HB-SIA 22mm
321X.XX.XX/322X.XX.XX Speedmaster Date 19mm
323.XX.XX.XX.XX.XXX Speedmaster Date 19mm
324.XX.XX.XX.XX.XXX Speedmaster Date 38 18mm
326.XX.XX.XX.XX.XXX Speedmaster Racing 19mm
327.XX.XX.XX.XX.XXX Speedmaster Mark II 20mm
329.XX.XX.XX.XX.XXX Speedmaster Racing 21mm
33X.XX.XX.XX.XX.XXX Speedmaster 57' 20mm
350X.XX.XX Michael Schumacher 20mm
351X.XX.XX Speedmaster Date 38 18mm
35XX.XX.XX/38XX.XX.XX Speedmaster Reduced 18mm