Davis Deluxe Mark 25 Master Sextant [025] INSIDE DIA. 5/16" This fishing shirt has a

This fishing shirt has a self-fabric strip to hang sunglasses or a small tool on and a micro-fiber panel on the inside of the shirt to wipe your glasses

5 x M8 (5/16 in) c'sk head screws on 136mm (5 11/32 in) PCD

3/8" Campbell S4

Eye strap keeps line captive

Works with 505-75 or 505-76 for a 4:1 purchase

Davis Deluxe Mark 25 Master Sextant [025] INSIDE DIA. 5/16" This fishing shirt has aMark 25 Sextant #025 The top of the line Davis plastic sextant, the Mark 25 features our Beam Converger mirror, sometimes referred to as a "full horizon mirror". A special coating is applied to high quality optical glass to allow the user to see through this mirror, yet still pick up images as faint as low light stars. The Mark 25 is illuminated by a long life LED and made of an upgraded plastic that is very stable. Comes with instruction booklet.