This speedometer is 65 MPH, pitot style (requires a pitot water pickup and tubing - not included). This was used in the late 1970's and early 1980's. So keep in mind this gauge is 40 years old and in perfect condition! Obviously this is a very rare piece and going to be hard to find another like it. So, if you have a Century boat with this gauge, you may consider this to upgrade your old gauge.