Hi Laura:
Given the colour and name of the machine I can tell you this much.
Coronado was the house brand of the MacLeods stores. The tan colour scheme would put your machine out at the same time as the machine I pictured in reply #6. That machine is a model D150 and was made from 1964 to 1966 (approximately). I would assume that the model number of your machine should be around D151 (or D149) as the blue ones that replaced them in 1967 were consecutively numbered as models D221 and D222
While they had a cloth bag in them as a secondary filter they were made to use paper bags (Now hard to find)
If you ever decide to get rid of it I'm not far away (Moose Jaw)
Doug