A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Brad Morris
Date: 2019 Dec 24, 14:05 -0500
As a collector/rrestorer/user of bubble sextants I have found most Bendix units used a luminescent paint containing radium 226 and they are still very hot. The paint is no longer functioning but thr radium is. ( I believe the half life is around 1600 years.)
I have eight Bendix bubble sextants and one rebuilt Civil Defense era "geiger counter"
Chris in VT