I bet it's an ao Smith then, which they stopped making in the 90s. They're selling for over 500 on ebay. I'm pretty sure the only new production ones are made today are made by aulektro, which is German i think. They use them to make wens lens and stuff, but I've only seen gold plated ones. I always thought the plating was for heat reflection mainly, but I've never used a silver one. I guess they make silver ones too, I've just never used one, the gold ones that I've used are just the bluest blue I've ever seen with amazing clarity. If yours ever breaks and you need to buy one I've been ordering mine from outlaw leather, they do amazing leather work too, that's where i got my arm pad.