Aircraft Clock, AChS-1, USSR, Working PBY Catalina allowing for course adjustments left

allowing for course adjustments left or right

from 0-4500

This T-1 Sighting Head was made by AC Spark Plug division of GMC

The aircraft altitude and speed was entered on the rear of the sight

but the glass and face markings are intact

Aircraft Clock, AChS-1, USSR, Working PBY Catalina allowing for course adjustments leftThis is a very competent example of the mechanical Soviet military aircraft chronograph, type AChS 1. The electrical connection in the back is to power a heater to the instrument, along with the mounting bracket. There is a helpful description of its multiple functions at http: www. prc68. com I 8day. html and we won't bother to repeat it here. Once wound, the clock operates as it should. Its nice to hear a ticking clock once in a while!