Speedometer TPM (turns per mile)

[36t46s]

I have a two 4" Jaeger speedometers, one of which has 1625 printed on the centre of the face, while the other has 1600 printed at the top (but hidden by the black circular surround). There is nothing in my parts lists or Rover books about this. Does anyone know which models have which TPM?

[RobHomewood]

My '39 14 Jaeger speedo has nothing written on the face which doesnt help you much I am afraid.

[jp928]

See if you can find an instrument repair shop - they can usually tell you TPM for a speedo with a very quick test if its not shown - mine did.
jp 26 Rover 9