A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Francis Upchurch
Date: 2015 Aug 11, 00:01 -0700
Well found! Suggests that the BN was being produced, bought and sold commercially in 1959. $35 is now about $306, so expensive, but probably worth it for aviators at the time?
I will contact Weems (still in Anapolis!) and ask them whether they still have any left in their attique!
Meanwhile, my home made one cost virtually nothing to build and works well.