Because this group is spread across the world rather than a small geographic area, I maintain a register of all 21s built, listed by chassis number and detailing original and current spec, owner details and location and ownership history.

All current 21 owners have read/write access to the file, and of course full control over what personal data is shown.

If you own a 21 and would like access to the register or have forgotten how to find it, drop me a line and I'll send you a link.

We also have a very useful 21-owner WhatsApp group for swapping ideas, organising group buys of parts for this rare car and general chit chat. 

If you're thinking of buying a 21, keep an eye open on this group - I will often be able to post information here before the sale has been announced publicly.