The Bell & Ross Military M1 chronograph was designed to German army specifications. All of its technical and functional characteristics meet German DIN industrial standards, including resistance to impact and magnetism, readability, imperviousness, etc. To meet special pilot requirements, the pressed synthetic crystal was designed to enable fast and easy replacement. It is clamped inside the case with four screws on the back of the watch.
|Diameter||Thickness||Water Resistance||Lug Width||Lug-to-Lug||Crown||Movement||Power Reserve|
|43 mm||15.5 mm||100 m||20 mm||?||screw down||Lemania 5100||40 hours|
These straps are 20mm at the lug and 18mm at the buckle, so they'll fit your OEM tang buckle.