There are three main differences between the #622-639 (on a brown strap), and the only other known model that we currently have is #612-714-31 (on a black strap).
- Both have very different case styles.
- The width of the hands on the 622 model are slightly thinner than the 612 model.
- The red print on the dial is bolder on the 622 model.
There is no greater joy than preserving our horological history, one watch at a time. My dear subscribers I beg you to look for Australian Railway issued watches. If you see one, snatch it! Send me a photo so we can put it in our catalogue, and if you don't want to keep it for yourself let me know.