It looks to be that way. Mine is stamped 0990, so September 1990 for this one. 19 inch frame. There is one online which is dated from August the same year, but I have not come across anything earlier than that on the web so far.I can't remember - were these a mid-1990 release? I can't remember then being in the catalogue until 1990, by which time the spec had slightly altered
They do not seem to have made an appearance in the 1990 Catalogue either. They show up in the 1991 catalogue but they have some more goodies added to the spec by this time (Logic crankset, Ringle seat binder for example).
I'm enjoying the detective work