Hello and welcome, your locks are what are called Box Locks, and were used on various types of containers like deed boxes and chests etc that had hinged vertically opening lids- the Hobb’s Protector bit you already know!
Banks would indeed have been among the many varied users of such locks although not exclusively so- many businesses and private owners also used them.
The receiver or strike plate as it is known was fitted to the lid and has two hook-like projections which enter the apertures in the top edge of the lock(called the salvage). That might be the flat rectangular plate in the centre of your pic, the projections will be on the other side thats not showing, if it is.
If you can carefully remove the lock covers and post clear pictures of the insides we can determine for you if they are intact or not. They are nice looking locks and there’s a few Hobb’s fans on here !
