Cassens & Plath Professional Marine Sextant. Original owner, purchased in 1977, well cared for. Have original bill of sale. Upgraded to 6 x 30 scope and full horizon mirror. Taking stars with this setup is a snap. Also have original 4 x 40 scope and split horizon mirror. Mahogany case. Serial No. 28604. $600 , plus shipping. A new C&P with 6 x 30 / full horizon mirror is $1800. Photos on eBay.