During this era, Norco had three models with 27" wheels and stamped dropouts, The Avanati, Monterey and Tourister. The chainstays are too short for a Tourister and the Avanti used top tube cable stops, as opposed to tunnels. So, it should be a converted Monterey. Ironically, it has been converted to near Tourister status (i.e. rear derailleur only, upright bars). The official colour designation was "beige". Original derailleurs would have been SunTour Seven, explaining the cable guide. OEM rims were unspecified other than being "alloy" (i.e. aluminum). The front wheel had QR but the rear was nutted. Thank-you for the serial number. Enjoy your new acquisition.