1979 it is then! Thanks for your input/wisdom T-Mar. (For both the catalog date and Shimano freehub knowledge.) I've had this catalog for years, and just ran across it the other day and started looking more closely at it. Among the things that I thought were interesting was that a couple of the low end bikes (LeMans and Omega) have braze-on cable guides on the top tube, while all the higher end have clamps. Is that odd? Frames made in different factories perhaps? Anyway, thanks again.

You're welcome ₤em. Glad you like.