Hey guy's. I've got a round of 7.9233 with the headstamp 3/45/oxo/-St (12/3/6/9). So by my reckoning it was production lot 3 of 1945 made in Teuto Metallwerke G.m.b.H. in Osnabrck, Germany. BUT, the -St. As I recall there is -St, St, and St+. I remember St+ means improved steel but can anyone enlighten me as to the other ones?