too bad about that, it looks like it was a high-end bike: the window lugs and forkcrown look very nicely finished, and it's an interesting mix of early '70s and later '70s style clues: no shifter bosses, no TT cable eyes, but has top-of-BB cable guides, and no ventilation hole in the shell. I'd like to know: width of BB shell, size of seatpost (should be stamped), pic of seatcluster...please.
Just playing a hunch, no expertise in this: Mexican-built Benotto...anyone?