HERE IS A NEARLY COMPLETE AN/APN-1 FM RADIO ALTIMETER DEVELOPED IN 1943. INCLUDED ARE AS FOLLOWS:

1. RT-7/APN-1 RECEIVER/TRANSMITTER (ELECTRONICS BAY MOUNT)

2. SA-1/APN-1 ALTITUDE LIMIT SET SWITCH (PANEL MOUNT)

3. ID-14/APN-1 DUAL RANGE RADAR ALTITUDE INDICATOR (0-400, 0-4000 feet) (PANEL MOUNT)

4. PAIR (2) OF AT-4/APN-1 DIPOLE ANTENNAS (UNDERWING MOUNT)

5. AUTOPILOT BYPASS PLUG (INSTALLED IN PHOTO OF RT-7)

6. ORIGINAL OPERATING MANUAL (NOVEMBER 1943)

REQUIRES MOUNT MT-14/ARN-1 (NOT INCLUDED IN THIS LISTING)

USED IN THE FOLLOWING AIRCRAFT:  P-61, C-119, B-32, C-121, H-19, P-5, AF-2W, AD-5, F2H-2/2N/2P, F3D, F6F-5N, F9F, XF10F-1, P2V-4, PB4Y-2, PBM-5S, PBY-6A, R5C-1, R5D-2, R6D-1, SB2C-5, TBM-3S