Does anyone know what models of Nishiki MTBs where available in 1984 and 1985 in Canada?

I found an MTB frame, no forks or components. The frame was painted and there are no decals. Welded, not lugged like most of the road bikes.

The rear dropouts are stamped SHIMANO SFR.

Serial number on the BB is: CD 00230

If it is a Nishiki frame, then Canadian market 1984.

I cannot find any catalogs. Thanks for any help to identify possible models.