Way interesting build. The CO2 seal part is like nothing I've ever seen. The body is that of a Nelspot, but highly and I may add very professionally modified. The valve tube appears to be missing the cup seal.
I definately want to see this thing up close. More pics PLEASE!
We gotta get this thing running for posterity's sake.
Back in the day, we were ALL "airsmiths". We experimented and modified our guns almost daily. There was no "aftermarket", no "custom shops", nothing. So, we did all this stuff ourselves.
Some of us were more creative and skilled than others. This appears to be just that, someone's garage creation. We owe it to that pioneer to get this thing going.