Instruments Navigation Instruments Back to archive categories English 18th Century Backstaff Davis Quadrant by Benjamin Macy Depth Sounding Device by Walker Large American Brass Steam Gauge Rare American Display Compass by Guillaume Bossimeau Brass Spinning Depth Sounder by Walker and Son, Ltd Copper And Heavy Gauge Brass Channel Light Early American Backstaff, Dated 1762 Essex of London Pantochronometer Navigation Set with Ray Skin Case. Presentation Telescope -Ship POLAR STAR Sector Navigation Scale by Watkins Artificial Horizon by Thomas Jones Drafting & Navigation Tool Set To:Lieut. J White Edward Massey New LLL Patent Yacht Log Hand Nantucket Harpoon Log Quintant by Cary of London Ships Depth Sounder by Thos. Walker & Son Ltd. Mahogany Cased Ship’s Artificial Horizon Rare Ships Boxwood Backstaff Rare Wood Bowl, Dry Card Whale Ship Compass By S. Thaxter and Son Boston Ship’s Speedometer Taff Rail Log