This is a new 100% original US Government military contract made speedometer. These are correct for the M38, M38A1, M170, M37, M715, 2 1/2 ton trucks and Hummers. These are still being made for the US Military. They have the correct markings and read correctly. They also have the little windows on the back side for the back lighting. These are not made overseas like others are selling. These fit a 3 1/2″ hole and will also fit in the Cj2A, MB, GPW, CJ3A, and early Cj3B. Note: We really can’t put a specific part number on this because each M-series jeep has a different part number for the speedometer.