Came across this on GB. Been lots of discussion on these but this one is the first 'paratrooper' I've seen, AND, the "D" appears to be reversed. ????
https://redirect.viglink.com/?format=go&jsonp=vglnk_156295010358916&key=4e54b5d4f2722df0e3467100c2766446&libId=jy0bwzy601013ro0000MA1x7ne6q6621bg&loc=https%3A%2F%2Fforums.gunboards.com%2Fshowthread.php%3Ft%3D10255%26highlight%3DDP%2Bmark%23%2Ftopics%2F10255%3Fpage%3D3&v=1&opt=true&out=https%3A%2F%2Fclone.sks-files.com%2Findex.php%3Ftopic%3D1002.0&title=DB%20marked%20SKS%20-%20Gunboard%27s%20Forums&txt=%3Cspan%3Ehttps%3A%2F%2Fclone.sks-files.com%2Findex.php%3Ftopic%3D1002.0%3C%2Fspan%3E
(https://i.ibb.co/bs1xNg0/Screenshot-2019-07-12-09-50-26-1.png) (https://ibb.co/gSyGtM2)
And the character right after the letter 'P' means 'four'.
An odd duck for sure :o