[xb-60]

Alf,

There are Smith chronometric tachometers available that look virtually identical to the difficult to find RC 83 that might interest you. Typically though, they don't have the red tell-tale needle, but all other details are very close to the Smiths RC 83.

English bikes (Nortons and Vincents, for example) were often equipped with these 80mm tachometers, and they are available at incredibly cheap prices ....say, around AUD40 here in Aus.

Here's one...

Cheers!
Glen