A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2017 Aug 30, 10:40 -0700
Here is a link with a full description on the sextant you have pictured. There isn't a sales price given :(
The uniqueness of the horizon and index mirrors on your model will come at a premium (especially if you have extra mirrors). I'm guessing replacement insurance would be near 2K US. Patience on Ebay might get one for $1000 from an estate sale. If two scopes and a bubble horizon are included (all mint) then insure for more.