A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Robert Swartz
Date: 2015 Dec 29, 09:18 -0800
If you are trying to open A-12 bubble chambers to clean then, don't, you'll ruin them.
Through many years of restoring these instruments, I have developed an effective procedure to clean their interiors.
Call me at 773-330-0860 and I'll explain.