Whole Horizon Mirror in Frame

Description

Replacement for the Astra IIIB and Astra Professional sextant – 51mm diameter with mirror frame.

Mirrors – Sextant mirrors have a limited lifetime before needing re-silvering or replacement. Estimates range from 2 to 6 years in marine service. While re-silvering is an option, good quality is hard to achieve. New mirrors are not much more expensive.