Hi,
My car sounds like it’s only a few units from yours. It’s also a late 1970 build, and it’s a PR suffixed model. 274PR. After contacting Andy Graham at Lotus and a bit of research here I found out that there was a batch of Federal (Type 65) Europas that were re-worked at the factory to become Uk spec cars. Apparently there was a change in the federal requirements meaning they were un-sellable if they were exported. Hence the PR suffix. So they have Federal markers but one wiper etc. I think John recently had a copy of a Club Lotus newsletter on his smugmug page detailing the history.
Interestingly, my V5 only had 274PR as it’s VIN. This proved alittle difficult when I imported to Ireland to say the least as the car didn’t have its original VIN plate with it. Thankfully the original window plate, which was still in place, read 274PR. A very kind contact on the lotus Elan net I contacted me and told me that the previous owner was trying to get a hold of me. He had found the original VIN plate and wanted to forward it onto me.
I hope it helps. Feel free to PM me.
Regards.