There was a 1974 1/2 Europa that had the gas struts for the boot lid and biscuit interior and maybe somebody rounded up!
I have 4259R, 4483R and the keeper 4688R, one of the very last batch exported to the USA. I am told 4701-4710 were the last Federal spec cars, but were sent to Japan, presumably as the export licence to the USA had run out due to emission or type approval problems.
These 3 cars had the struts, the cloth inserts in the seats, and the map pocket on the bulkhead between the seats.
These 3 were built Feb-April 1974. It seems that cars from about 4250-4710 were made Feb, March, and April 1974 when it seems Hethel were flat out producing Federal spec cars as quickly as possible to get them to the USA before whatever the magical cut-off date was. That makes about 460 cars in say 60 working days, or 8 a day.
Q cars exported to Europe seem to have lasted until August 1974, and P cars for the home UK market carried on until March 1975, with my first car, 75032429P, a RHD car with a Federal bodyshell, so presumably Lotus were using up all the shells they had lying around while they converted to full Esprit production.
In the 33 months they were making TCS, they seem to have made about 3130 TCS of P, Q, & R, types, so that equates to 3130/715= 4.4 a day on average.