I recently bought a 1967 420 (not 420G) with 4-speed manual transmission + overdrive. LHD. I know that the manual tranny was very rare, but I'm trying to get specifics on how many 420's came equipped with manual transmissions....can't seem to locate the data. Any suggestions?

 

You could try these guys. They are official Jaguar and have all the production records.

Jaguar Heritage

 

Thanks Fraser! Great resource, and one I was unaware of.