Spacematic Counterrotation
Fortis · Cosmonaut
- Lug width
- 20 mm
- Case diameter
- 40 mm
- Reference
- 623.10.51
- Family
- Cosmonaut
Bands that fit
Cut and stitched in Milano, in the width this watch takes.
Single Pass Hammered Yellow Calfskin Strap
Saffiano Leather Strap Light Blue Ecru Stitching
Hammered Black Calfskin Strap — Ecru Stitching
Black Calfskin NATO Strap
Black Saffiano Rubber StrapWill a strap close on your wrist?
Set for this watch: 40 mm of case and 20 mm between the lugs. Add your wrist and see where a standard strap would close.
mm
Filled in with the case diameter, which is what we hold for this reference. Measure the watch tip to tip for the exact answer: it is usually a few mm more.
Enter your wrist measurement to see whether a standard 75/115 mm strap closes on you, and where.
Sizing notes
- With a 40 mm case on a 20 mm lug width, any 20 mm band fits without adapters.
