I saw this unusual marking on an Eddystone 1917 receiver and wondered if anyone has seen this before or can explain its significance. It is a slash mark in a circle, immediately adjacent to the serial number.
I saw this unusual marking on an Eddystone 1917 receiver and wondered if anyone has seen this before or can explain its significance. It is a slash mark in a circle, immediately adjacent to the serial number.
Can you get a better view of the mark?