RARE! USN USMC A-4 Skyhawk Attitude Indicator Gauge Instrument Type AN/AJB-3 Aug 16, 2019 rare This is an original Attitude Horizon indicator gauge instrument as used in the USN USMC A-4 Skyhawk. It is a AN/AJB-3 type artificial horizon gauge. This gauge was used by the pilot when flying on ins...