A few posts below this one shows a Parilla Tacho that I confessed my lust over. In the year or so since that post moves have been afoot. I have had a pair of Bantam Speedos reworked and am now the proud of owner of this fine pair. Both are calibrated for use on Triumph Twins, the Speedo to a pre unit gearbox drive, and the Tacho has been modified for a timing case drive.
I think, just maybe, that this is the only pair like this in existence.