Interesting “M. Blink. 16.” Goetz Berlin 4×20 Signals Monocular
Picked this up not knowing what it was, finally found some info on it, something to do with a red lighted signal relay of some sort (latter version of Indian smoke signals ;-), it was hard to see for sure with the naked eye so they gave the guys these tiny monoculars to use. Optics are still impressively good after nearly 100years!
They also bolted these to things, the signal lights themselves (?). This one does not have mounting holes, was meant to be handheld unless it was strapped down, the missing paint may be where a strap went across it.
