Spotted this interesting bird from Haldimann's Flickr;
https://www.flickr.com/photos/280920...7667530337851/
Like most photographed very late K-4's of 334xxx/335xxx production, it appears without any apparent unit markings, but the yellow cowling stripe and rudder(?) got me curious. The reported location doesn't really help me.
Anyone possibly have more information?
Also, I made a quick profile of my rough estimate about the camouflage;
