Two items which may be of interest to trawler navigators and compass adjustors: 1) Astro-Compass Mk II, by Sperti Instrument Co. WWII era. Instrument is complete and in excellent condition, complete with base, and is in the original fitted plastic case, which is in good used condition. $100 + shipping. 2) Universal Sun Compass, Model SC-1, by Abrams Instrument Co. WWII era. Instrument is complete and in excellent condition in original wooden case. Case exterior is olive-drab paint; interior is varnished wood nicely fitted out for the intrument. $100 + shipping. If someone is interested in both items, I will sell both for $175 and include shipping within the continental U.S. Google for these items and you'll find plenty of information and pictures.