Garrison Wood Stove
Garrison wood stove was another casualty of the environmental regulations in the early 1980s. They had a good run with their heating line from the late 70s until that time. Unfortunately, their models were too costly to update and the company ended up folding sometime in the mid 1980s.
The wood burning units consisted of the Garrison I, II, and III. (Great names!) The flagship model was considered to be the Garrison I. This was their largest wood heater and had flue measurements of eight inches. It was rated to go up to 76K BTUs, and could handle logs up to 24 inches, so it was a pretty good workhorse back in the day. The II and III only had 6 inch exhausts and thus were smaller. One notable feature with their flues were that they were detachable, so that they could function similar to an insert in a fireplace or similar structure. They also had a coal burning version and a dual fuel convertible model, although I don't think they were as widespread.
As with most old models, its usually better in most cases to upgrade to a modern heater to get the tax break, efficiency improvements, and up to date aesthetics.