I bought this piece from David Dodds shortly after he made it several years ago. And yes, it is the same one shown on page 235,#8, in Neumann's and Kravic's book on RevWar weapons. It's also shown in Neumann's other book "Battle Weapons of the Revolution" on page 224.
I do display it at the CLA each year along with several other pieces that David has made for me, so it may have been seen there.
Two years ago an exceptionally fine Gentleman contacted me and said he had a full scale set of drawings of this piece that were made in 1976 by a builder, Curt Hemlepp.He offered to send them to me. I now have these drawings-very detailed-thanks to the unselfish generosity of Mr. Geoffery Jones of Amhurst N.H.!
Guy...do you have the NPS web address? I'll search for it, but I'm not at all computer literate and I probably won't find it too easily.
I plan to use this piece when I go home bear hunting in a couple of weeks. The darn thing kicks like a mule, and after 3 or 4 rounds you'll call 911 with a dislocated shoulder
! I'm sure that it will double-lung a bear with no problem, however!
Rich Pouncey, aka woodsrunner