They were so cool, the whole TR4, TR-4A and TR-250/TR-5. The TR-6 came after, maybe 1969 or 1970 and was really a different car.
The 4 was early to mid 60s, the 4A maybe 66-67 or thereabouts, and the 250 in 68, maybe 67 as well, the last year of the fabulous Austin Healey 3000.
The Triumph Spitfire was built pretty much across most of second half of the decade and was even smaller and maybe even more fun, till it caught fire, which pretty much was a standard thing. My 1966 caught fire in the switches in the steering column driving through town one evening and I continued across town with flames coming out of the steering wheel until the lights went out. All very routine with these things, but how much fun it was!