Need ID info, round door breech safe, 1300 lb 3'x3'x3'

Hi to all. I bought this 1300 lb cube of steel from a semiconductor mfg co in UTAH. It has a round door and had a gear/lever assy which is missing. I have to use a steel bar to rotate the door which is quite heavy and getting a little tough to handle. I think it needs lubrication. I would like to know how to identify the mfg of this safe. It may be a jewellers safe. There are no shelves etc inside, only space. The safe is constructed of 1 1/8" steel plate without any attachements other than the door assy. Please help.