Aelle was plain gauge carbon-manganese tubing and typically found on low, mid-range models. This particular frame is circa 1983-1987. Trtrot was a full range, Spanish manufacturer. I remember models form the early 1970s boom. It is rare in the fact that they were not distributed widely but that rare is not the same as valubale or collectible. Typically, they were nicely finished and well manufactured, but nothing special.
I would certainly be looking for a better frame to hang my C-Record on. The other concern is Spanish bicycles, depending on their age, use French threads. The boom era models certainly did. I'm not sure when they converted to English or if they even did, but I would assume that like most French models they converted in the mid 1980s.