The Rare Vintage Kollsman AN5760-4B Altimeter is a highly collectible aviation part that was used by Bonanza Air Lines at Sky Harbor Airport. This altimeter, manufactured by Kollsman, is a unique piece of history that would make a valuable addition to any aviation enthusiast's collection. It is a rare find and is sure to be a conversation starter for those with a passion for vintage avionics.
Available now is a museum-quality Kollsman AN5760-4B Pressure Altimeter, a premier artifact of mid-century aviation. This specific unit carries extraordinary provenance, bearing an original service tag from the Bonanza Air Lines Instrument Division out of Sky Harbor International Airport, Phoenix. Known as the "Route of the Gold Strikes," Bonanza Air Lines was a pioneer in American commercial aviation and the first all-turbine airline in the nation. Given the specific Sky Harbor maintenance tag and the high-sensitivity AN5760-4B model (rated to 50,000 feet), this instrument is a documented survivor from the era of the legendary Fairchild F-27 "Silver Dart" turboprop fleet.
Technical Specifications:
• Manufacturer: Kollsman Instrument Corporation
• Model: AN5760-4B (Sensitive Altimeter)
• Part Number: 671CPX-4-038
• Operational Range: 0 to 50,000 Feet
• Provenance: Includes the rare C.A.A. Station 4172 yellow service tag from Bonanza Air Lines / PHX Sky Harbor base.
This unit represents a critical period in aviation history. After Bonanza merged into Air West (later Hughes Airwest), many of these original branded instruments were lost to time. Finding a unit with the Bonanza branding intact is a rarity. Independent valuations for units with this specific level of airline provenance and historical documentation place the item's market value in excess of $500. It is a centerpiece for any high-end collection, a must-have for historians of Howard Hughes’ aviation empire, or a sophisticated addition to an executive office or library.
Note: This item is sold as a historical collectible. It is not certified for modern flight and is intended for display or study. Please refer to photos for a detailed look at the exceptional preservation of the service tags. Can provide more photos upon request.
Condition Assessment: This instrument is in superb vintage condition, featuring a crystal-clear face and a fully functional barometric adjustment knob. While it displays the authentic character and surface patina expected of an "as-removed" aviation component, the housing and original historical tags remain remarkably crisp and legible.
