Thanks for that image, Max. That is quite the Mosler. I wish there was some information for it. Having two Mosler screw door safes, a single door and a double door, I have been gleaning as much info as I can on them. There seems to be variations on two basic designs. A larger frame starting about 1890 and a smaller frame later. By the positioning of the crank pinion gear above center on these doors, they appear to be the smaller version like this one that is from 1915 according to the Mosler serial number list.

I am currently finishing up a restoration of this safe and it has a very different way of being constructed which makes the image you posted very interesting to me. I wonder which of the two construction versions was used for it. I will have a thread on this in the somewhat near future.
The larger frame has the crank pinion gear at center like this one from 1891.

Back to the Victor… yes, I should have said rare vs unique. 🙁blush):