Was walking through the tool section at the local flea market and happened to stumble upon this. It seemed like a pretty cool little gadget so I asked how much.. He said $1 so I figured WTH and bought it. Any further information if anyone knows about it would be cool. It's stamped with "Japan" on the hammer part. (Not very good stamp) Came in a little "genuine pigskin" Noymer pouch, also made in Japan. And here is a picture with it opened.