Hello,
That's a nice old Mosler you have there! On the handle, is the serial number stamped into it 4 5 9 3 6 or are there more numbers that the camera did not capture well?
Just based on first looks, I would guess your safe is from somewhere around 1905 to 1910, but if your serial number really is 45936, then your safe was made before the available serial number table
viewtopic.php?t=62920 , so based on number of safes made each year, probably made in 1885.
Here are photos of Mosler serial number 48645
viewtopic.php?t=62920&start=15#p482348Squelchtone