Vintage Davis master sextant for boating celestial navingation

It’s vintage but new never used
laster Sextants feature the following professional specifications:

• Precision machined slow travel gear and worm mechanism.
• Highly visible, easy-to-read micrometer drum and vernier allow.
Ing readings to 2/10 minute of arc.
Fully ribbed, three circle sextant body for platform strength and stability.
• Large, contoured handle designed for sure, steady grip and angled back for added control.• Precision machined slow travel gear and worm mechanism.
• Highly visible, easy-to-read micrometer drum and vernier allowing readings to 2/10 minute of arc.
• Fully ribbed, ,
The Mark 15 Sextant is great for learning Celestial Navigation or as a backup for GPS. This plastic Sextant includes seven large sunshades, a 3 mm x 27 mm star scope, and an 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 degrees to -5 degrees and comes with a traditional half-silvered mirror.