Garth Optical was around for quite a few years at mid century. They were located at Springfield, Massachusetts and had just moved to Kendall Park, New Jersey when they sent me the catalog. They were advertisers in Sky & Telescope and Mechanix Illustrated, among others. I did a search and only found a couple of mentions. One advert on Phil Harrington's site, and one on a site with a wonderful old do it yourself scope page in Mechanix Illustrated for April 1957.
As a shock, look at the cost of aluminizing and coating a 12" mirror!!!
http://www.philharrington.net/old50.htm
http://www.4x4cherrypicker.com/stuff/plans/richest-field-telescope.pdf
Clear Sky - Rich
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