thanks all for the tips...

I am doing the transplant of the face a US spec speedo (miles/km) that has
a broken needle onto a Euro spec speedo (km only) with good needle...
working on a doka imported from Germany. Worst comes to worst I will try to
get a good working US spec speedo but it will be hard and expensive because
it's a Doka 16 which I heard it requires a different kind of speedo than a
14.

wish me luck.. I will post result once done...

dan