This is a rare chance to own an original piece of a World War Two USN Consolidated PBY Catalina seaplane. The engine sync gauge instrument is actually called the synchroscope and it is used by the pilots to balance the engine rpm between the two engines. When this little needle stops spinning the two engines are then running at the exact same speed. This gauge is clearly marked Bu. Aero U. S. Navy. It is also marked slow fast to tell you which direction to move the throttles.  The gauge is 2 1/4 x 2 1/4 x 3 inches and is in excellent condition.When looking at the PBY instrument panel you see this gauge mounted right in the upper middle so both pilots can easily see it. The PBY Catalina seaplane was designed as a ASW and search and rescue patrol aircraft. Its large size allowed it to stay aloft for long periods at a time. The PBY was was the patrol aircraft that found the Japanese fleet during the famous Battle of Midway. The PBY was also flown by the USCG, US Army Air Force, the Canadians, New Zealand, Australia, Dominican Republic and the British. It was also called the 0A-10A, the Black Cat, and the Canso. Today there are still several PBY's that fly. Most had been used as firebombers at one time.This Engine sync gauge may have been used on other USN, USMC and AAF aircraft such as the PV-1, PV-2, P-2V, R-4D,etc.We accept payment by PayPal in US dollars only.  Payment must be received within 10 days of auction closing unless prior arrangements have been made. Buyer to pay shipping by US mail. AZ residents add 6.7% sales tax. If you have any questions please contact me via e-mail before bidding. Thank you for your interest in my auctions