My Torque Controls, Inc., torque wrench is a hollow-square-tube dial-gauge style I got military-surplus when the USS Yorktown was decommissioned in 1970. There is no Model Number on it. It's 1/2"-drive, 24-3/16" long overall. According to the Operation Instruction sheet, it could be any of four Models -- D2600. D350, D3175F or D3250F -- but the Serial Number is U14883. I need to find someone or somewhere to calibrate this wrench, as I've never had it calibrated the whole time I owned it, and I'm not sure of its accuracy anymore. It has Calibration Instructions inside the case (pictured), but I need a "certified torque tester" machine to load it for testing. Suggestions?