Radio Altitude Indicator (Altimeter), ID-236/APA-61 for AN/APA-61 Korean War It is in exceptional condition

It is in exceptional condition for its age

but all are in original packaging and never used

5 inches wide and ~12 inches long in its case

The loader had had a rotating periscope at their station

Radio Altitude Indicator (Altimeter), ID-236/APA-61 for AN/APA-61 Korean War It is in exceptional conditionThe WWII era Radio Altitude Indicator, ID 236 APA 61 was a component of Radar Bombing Navigational Computer AN APA 61. The indicator was used to measure and indicate to the pilot the altitude over the terrain during flight. Made by Roller Smith. This unit looks to be originally of the AN APN 1 system and was modified for use in the AN APA 61 system. The nature of the modification is unknown. The precursor AN APN 1 Radio Altimeter was used in a number