Tube Welder: Manufacturer: Dimetrics, (1) Model: 150PTW1, Serial: 413, Acquisition Date: 9/29/93 Tube Welders (2): Model PTW-150, Serials: 766 & 20, Acquisition Dates: 2/18/98 & 11/01/94 Three pieces of Tube Welder Heads: Manufacturer: ARC, Models: 9E-2500, 9-4500 & 207. Serials:015873, 016908 & 9388. Acquisitions Dates: 12/22/94, 5/22/95 & 10/22/92