Russell at chronometrics.co.uk sells them, repairs and restores them.
I've sent two emails asking for parts prices delivery to nz, without an answer, is Chronometrics.co still in business? Or just poor at answering mails?
and;
Not sure wether the guys in UK are still in business. I sent them an email 3 months ago. No reply.........
I was in contact with Russell around about December, and he was very helpful in identifying my SC 3305/22 1620.
I asked if I could post the email transcripts on here, but I got sidetracked looking for the thread I used to enquire, but he said that'd be fine.
He said he worked for Smiths in the Calibration department.
............ I sourced my speedo from agent in New York. It was an odd item he had on his shelf.
Just curious, but is it an A10 speedo? If it's been sitting on the shelf since new, might be worth considering a grease and oil change? Reason I say is because recently my speedo (above) had a bit of a hernia and needed overhaul, but it had only done 10K miles since (I think) it was overhauled in about '79, so is possible the lubes had deteriorated (dried), as it sat unused for 10 years or so before my latest rebuild.
Quick overview on its history; Probably from a '68 A65, and the code on the back "PS: *****", indicates ' Police Service/Special(?) **** '