This afternoon, I came across an aluminium 1 inch illumination on an old training area. I sometimes come across these, and have no problem finding the headstamp. This one I found today has me stumped. It is marked ‘ERMAL’ and dated December 1964. The condition is too bad to see the stencil on the side.
Does anyone know what maker this is or have a makers chart for 1 inch flares?