Kmf c throat microphone
Found this on eBay on 2017, another rare late war version with simplified switch, but neck band and speech capsules remain unchanged.
From Nick Komiya:
Kmfa and Kmfb mikes were used in parallel until the end of the war, but for the Kmfb there was a simplified version called the Kmfc that omitted the push button on the side and reduced the size of the switch box to approximately 50%. Not much is known about this version of microphone introduced in 1944, but as it was with a 3-pronged plug, we can assume that it had the same function as the Kmfb. Also towards the end of the war, switch boxes normally associated with throat mikes for the field telephone also seemed to be built into Kmfbs.
My old post on my FB Page: https://www.facebook.com/media/set/?vanity=whrestorer&set=a.552496618266094