Omega Speedmaster Moonwatch Lug Widths

 Reference Number Model Lug Width
3XX.XX.42.XX.XX.XXX Speedmaster Moonwatch 20mm
3XX.XX.39.XX.XX.XXX Speedmaster Moonwatch 19mm
3XX.XX.40.XX.XX.XXX Speedmaster Moonwatch 19mm
3XX.XX.44.XX.XX.XXX Speedmaster Moonwatch 21mm
3XXX.XX.XX Speedmaster Moonwatch 20mm
522.XX.42.XX.XX.XXX Speedmaster Moonwatch 20mm