[Quote]what is it now? an original Mauser sporter or some kind of plezier rifle made by Mauser for DWM with DWM parts?

First, it is not a Plezier rifle! That name is used for the upgrade ones with long, octagonal barrel, sent by DWM to South Africa, only.
It’s an "Army Hunting" or C rifle put together by Mauser for DWM, intended to be a gift for promotional purposes and numbered in a special range, note the low 62 serial number. There was some variation in the exact configuration of the type C rifles. As Jon Speed already wrote, Original Oberndorf Sporting Rifles, page 112: “Similar rifles were made up by Mauser using DWM parts.”