[dan1000]

My 1974 Pressurized Skymaster (T337G) has an airspeed indicator that reads in knots. But my POH and all the placards in my airplane read in MPH. The ASI has all the correct markings in places that, when converted to MPH, match the POH.

My questions:
1) Where can I get a MPH ASI for my aircraft?
2) Should I bother?
3) Is it legal the way it is right now?

Dan