stephane wroteThanks Garry for details. safeman, all the compact same body safes are not fireproof. they weight 160kgs each so really strong for the size/age. the baby Tann do not have same finish inside so it is possible to see, a reinforcement steel bar with an incomplete engraving “RKSHIRE STEEL Co LtD SCOTLAND” probably some letters in front “RKSHIRE” has been cut. anyway drawers are interchangeable between them and just the locks of drawers are from respective manufacturers. if the body maker was not in scotland sure he was the provider of the steel for an unique maker.
Stephane, the full name embossed on the plate will be :

The Milner AO36 is still puzzling me because of the apparent thickness of the door edge which looks too thick for a List 2 which would only be about ¾"(0.75). This could be a photographic illusion of course. The only alternative is the Milner British Army Safe with a door edge about an inch thick and in only one size - 22 inches high.
Could you tell me the thickness of the outer body which will show on the back where the rear plate has been set in. (4.76, 6.35, or 9.5)
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