Synchroscope Kollsman 549N-06 PBY Catalina 2 DC-7 but not bad given the

but not bad given the age of the instrument

According to the Royal Australian Air Force 346 Types and Locations of Instruments dated 1945

or Elevator/Nose Position Indicator

operates in the same manner but has greater air volume capacity for larger aircraft with more air-driven instruments such as a heavy bomber or transport

Synchroscope Kollsman 549N-06 PBY Catalina 2 DC-7 but not bad given theThis is an authentic WW2 vintage Dual Engine Synchroscope Indicator made by Kollsman, PN 549N 06, as used in the WW2 era US Navy's Consolidated PBY Catalina Patrol Bomber Seaplane (see photo of PBY Instrument Panel from the Pilots Flight Manual with a yellow dot showing instrument location). The US Navy Anchor logo is stamped on the back and on the face is embossed "BU AERO US NAVY" (Bureau of Aeronautics). A synchroscope informed the pilot or flight