Upon inspection, it appears this speedometer has never been used. The face / dial is perfect as is the chrome bezel ring. There are some very slight scratches on the plastic lense but I am confident that was just from someone cleaning it.
This speedometer is 65 MPH, pitot style (requires a pitot water pickup and tubing - not included). This was used in the early 1970's up to about 1974 or so give or take a year. So keep in mind this gauge is 50 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 an early 70's Century boat with this gauge, you may consider this to upgrade your old gauge.