ROCKWELL COLLINS 478A-2-ZIPHORE II Zero Adjustment Bearing Degrees IndicatorThis is a vintage aircraft instrument used in cockpit or maintenance applications to indicate zero-adjusted bearing or angular reference for navigation, gyros, or other avionics systems. Ideal for collectors, restorers, or museums.Item Details:Manufacturer: Rockwell CollinsModel / Part Number: 478A-2Type: Zero Adjustment Bearing / Angular IndicatorCondition:New Old Stock - Photos show calibration certificateEra: Mid-20th century / vintage aircraftOrigin: U.S. Military / civilian aviationFeatures & Notes:Measures zero-adjusted bearing in degreesVintage aircraft instrument, robust and collectibleSuitable for cockpit restoration or avionics collectionClear dial markings and angular reference scaleWhat’s Included:(1) Aircraft Zero Adjustment Bearing Degrees Instrument, 478A-2No additional hardware, wiring, or manuals included unless shown in photosConditionItem is in excellent condition.Sold as-is / untestedAll photos are of the actual item; please review carefullyShipping & HandlingFast Shipping!
Collins Radio Company type 478A-2 bearing resolver test set, marked with part number 761-0048-003-00 and serial MCN 231. The front panel is labeled ZERO ADJ, VAR, VAR INPUT, and BEARING DEGREES, with a rotary bearing selection scale from 0 to 360 degrees. Based on its layout, connectors, and accompanying paperwork, this appears to be specialized Collins avionics bench or calibration equipment rather than a cockpit-installed flight instrument.
Included with the unit are Collins service documentation and an FAA Repair Data Sheet, along with Collins quality control and service tags. The paperwork identifies equipment type 478A-2 and serial MCN 231, and the repair sheet references Collins part number 522-3626-000 with MCN 231 noted. The side of the housing is stamped 761-0048-003-00. These markings give the piece strong identification and provenance value for collectors of Collins Radio, vintage avionics, FAA-related maintenance equipment, and aviation electronics.
This is best described as a vintage Collins bearing resolver or bearing calibration test set. Exact end-system application has not been confirmed, so it is being listed according to its visible markings, tags, and included documentation.
