I bought this plaque for the museum. It is in clear glass, with beveled edges, 20.3 x 12.1 cm. The lettering is frosted on the back. I am not sure if it is acid etched or sandblasted, but the lettering is slightly lower than the surface glass. Is this an original 1930s one or were they reproduced later? Thanks for advice.
By the way, I bought a rather nifty LED light box, A4 in size and just 5 mm thick to display the plaque. Not yet tried it out, but I hope it looks good.
Anton