Hi and thank you for looking. Today I have a very old Amazing Estate Find Kelvin &White 10 7/8” Brass Ship Compass with mounting or leveling ring.This compass says Boston and #4473 stamped on the Compass.  This item measures 12 1/4” across and stands 5 1/4”tall. This item is believed to be in original condition and has the oil based oil in it. Several local  antique shops have stated this is in amazing condition and state it is very old and an amazing find for collectors. This item will be shipped and signature confirmation with additional insurance. Any Questions please Ask. Serious offers welcomed.