Chubby, identifying some Stratfords could be a nightmare, as they went through a period of Madness in the early 1970s whereby model identification was by the name printed on a thin aluminium strip stuck onto the handle!
The handles, although chunky were die-cast zinc and many cracked at the point where it projected from the block, common if doors swung back against a wall or neighbouring safe.
This of course led to handles being replaced or swapped and resulted with lots of confusion. At best, you could have a basic model like a Standfast, fitted with a new handle with no identifying name plate at all.
At worst you could have a basic model Standfast but with a named handle swapped off a Consul or a Concord, falsely creating the impression the safe was of a far higher grade than it really was.
Used to see that a lot as hundreds of Stratfords dotted around here and removing the cover to inspect the boltwork was the only way if no serial numbers were visible. PS, Ratner’s used lock and key numbers for ID but think they still had the bolt numbers as well. Might be worth a look on the top hinge, front face and the side in case it is one with a Stratford Sterling handle fitted.