46mm case diameter.

Swiss. When creating the BR 01 aviation watch, the designers at Bell & Ross took their inspiration from aeronautical instrumentation, the ultimate reference point for legibility and reliability. This example boasts an impressive 46mm PVD-coated, stainless steel case. The clearly marked dial has hands and number markers that have a generous application of photo-luminescent coating for maximum legibility in low-light or dark environments. At first glance many find this to be a cumbersome watch, but once it's on the wrist, it is comfortable and surprisingly discreet. The watch was found to be running at the time of cataloguing. It has not been tested for timekeeping accuracy and may require adjustment.