Hi Chaps, here's my latest EK1. It's the standard 3 piece construction (silver frame & iron centre) & of a nice quality. Somebody has tested the silver by giving it a good scratch near the hinge on the back It's not marked in anyway; but does anyone know a maker that made the pin this way? I've got a hunch it's a post WW1 type made in the 1920's/30's. Is that right?