Davis Instruments Mark 15 Master Sextant

Mark 15 Sextant
#026

This model has many great features including seven large sunshades, a 3 mm x 27 mm star scope, and easy-to-read micrometer drum vernier scale that reads to 2/10 of a minute. The Mark 15 has a 7" (18 cm) frame radius graduated from 120° to -5° and comes with a traditional half-silvered mirror.

Comes with instruction booklet.

Owner's manual: https://productimageserver.com/literature/ownersManual/42749OM.pdf