👍 Yes, 1974. I'm beginning to think the "T" must mean "Turin." Having two serial numbers with such low sequence numbers suggests to me the sequence number must be for a short run series So, there is an "L" sequence, which I assume had more in the sequence. If there was a "Touring" sequence, I'd expect random examples to have sequence numbers higher than "15". OTOH, a series produced just for Turin would likely have a pretty limited number of examples per year. (Would be nice to have another couple examples of these to increase my confidence.)