A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Ed Popko
Date: 2019 Mar 26, 08:34 -0700
"Special value", well yes in that it is an unusual and somewhat rare item. Google around and you find no references to it. For sure, it was a limited production item, probably quickly displaced by something else.
It is a lovely device. So I would phrase it "Special luck to have found one".