From the mid-20th-century German military, this is a fully functional field phone. Weighs in at 8.2 lbs, and comes self-contained in a 10-1/4" x 6-3/4" x 4-1/4" dark brown Bakelite case with a handset on a 4-foot cord, a 52" 2-pin jumper, 25" TT plug cord, ringer crank and a battery holder for the pair of D-cells you'll need to add. Side has slots for the carrying cord that we don't have, and the inside lid has a full schematic. Should work with standard stereo speaker wire, and we'd get a pair of these phones if we were you. Small quantity available. These are surplus and have wear and tear on them. We will pick the nicest of the lot.