Just noticed that the Army Portable forge you show is actually the later version. On e-bay about a year ago there was one of the earlier that had a side mounted crank blower instead of the electric one shown above. There was only 1 box on the earlier one, that everything packed into and was covered by a lid (no lower box). I forget if the one I saw was a Buffalo or Champion built one (or at least the blower, air pipe and Tuyere the components looked to be the same as the ones used in the rivet forges.
The one that was on e-bay probably would have been Turn of the Century to The Great War (WW1) since it was all stampings, and your diagram might be WW1 to modern times. The reason I say modern is that a fellow blacksmith in Ct told me how his son amazed his fellow Army Men or Reservists when he fired up the portable forge, and started using it. Apparently the portable forge is still part of the standard kit for the remote Bases or the Maintenance Battalion. IIRC this was during Desert Storm.
Wish I had the cash at the time for the one on ebay.
Edited by crij, 30 October 2009 - 02:14 PM.