New Ruby owner - an introduction

[Reckless Rat]

On the subject of speedometers, this is the speedo in my RP saloon, which came with the car over 40 years ago but isn't original as it should have a Magmo unit.

I don't think it's a Ruby one either, as it carries the serial number 42871 and the number of TPM is 1000 and not 1040.

Can anyone tell me what it's likely to have come from? It works fine but isn't particularly accurate, reading a bit high.

[Chris KC]

On the subject of speedometers, this is the speedo in my RP saloon, which came with the car over 40 years ago but isn't original as it should have a Magmo unit.

I don't think it's a Ruby one either, as it carries the serial number 42871 and the number of TPM is 1000 and not 1040.

Can anyone tell me what it's likely to have come from? It works fine but isn't particularly accurate, reading a bit high.

A quick speculative Google suggests it might be from a BSA or Triumph motorcycle?

[Ivor Hawkins]

Unoriginal speedo Bruce? they’ll deduct points at the concours you know!

[Chris KC]

I'm with Bruce on this one - after a few miles' appraisal my Magmo was chucked in the nearest hedge...

[Reckless Rat]

Well I have to admit I won't lose any sleep about the rivet counters. The TPM difference is only 4% so it's not hugely inaccurate, just a bit. In all the years I've been using the car I still haven't managed to get done on a speed camera yet, and it's not because of not trying hard enough!

Sorry for the thread drift.

[Bob Olive]

Funny that. I have the same as Reckers on my ‘32 AH tourer. Works pretty well, not that I’m too concerned about speedo-watching. 
On that score I have the remnants of two Magmos if any restorer/rivet counter wants to try to make one good one out of the two….