Belgian, between 1854 and 1892 - tending, by the design of the locks, toward the earliest part of the century. The ELG over crown in an oval cartouche = ÉPREUVE LIÉGE - Liége Proof House, made and sold by the tens of thousands in hardware stores from PA to OR and everywhere in between. Photos right way up, so'we don't haver to crank our necks round to read'em would be much appreciated, in focus would be even gooder so that we could take a look at all the other stamps under the barrels. The crown over something or other is an inspection mark - usually a single letter.
