By Steve Hilton, 24 December, 2018 Description The compass is 8 1/2' in diameter and 5 1/2" deep. Outer ring measures 10". Marked E.S.RITCHIE BOSTON. 4211 APL.7.1862, MAY.12.1868, JULY.19.1870 . No marking on the case. Category Maps, Charts, and Nautical Medium Brass/Copper Distinguishing marks E.S. RITCHIE BOSTON Condition Good Size and dimensions of this item 8 1/2" x 5 1/2" Date Period 1870 Weight 9 1/2 LBS History Found at an estate sale For Sale? Yes Photos Log in or register to post comments