A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Position-Finding
From: Randall Morrow
Date: 2017 Oct 4, 12:16 -0700
These are the folks I got my mirror from:
A 6 x 6 inch mirror 1/4 inch thick is 20 dollars and I have been using mine for 5 or more years. They get fine scraches of course but this does not affect use.