Yes, early SDP production was quite decent, comparable to many of the other makers, but they seem to have lost their Imperial era reputation. Steyr was once the equal of Mauser Oberndorf, a great company with men of great insight and skill, after the 1930s that seems to have been lost, - part of this was the reality of a lost war, which hit Austria as dearly as it did Germany. Gone were the days of large scale arms manufacture, so they developed their automobile line and made vehicles primarily. Small arms taking a predictable decline though maintaining high quality (small numbers though, only a few thousand a year). The decline was also more profound because of the nature of the new company, after Austria's great economic collapse in 1931, the companies small arms business largely evaporated. Quickly its past was swept away and it became a modern corporation, government owned essentially, through a bank that was state owned after it collapsed, merging with two other companies, rationalized and naturally small arms weren't a significant part of their production. Had it not been for Rheinmetalls projects working around arms restrictions (Solothurn) SDP probably would have given up arms altogether. As it was in 1937 it was a miniscule aspect of their production and probably kept only because of tradition.
Seeing as we have you in a photographic mood, can you do one of the underside of the bolt handle, the bottom flat, it should have acceptance there also. It should be e/623 x2, but early in 1941 SDP started to use Radom bolts and you never know.