You say Mauser/1933 and the SR is S-M 1924? What is the serial, - generally B-prefix below 38000 are rare (rarely seen). Many of those seen are B20000-29000 to Ethiopia which some say are diversions from shipments slated to China where most early production went. We (thanks to Jon Speed) know general production, domestic and export figures, more is probably in his Mauser Archive, which I do not have the time to dig through at the moment... basically piddly numbers were made and sold 1930-1932, almost all for export (probably China); late 1932-1936 production soared, increasingly for domestic consumption, especially by 1934. Still tens of thousands were sold, many to Ethiopia, but most probably to China, some probably to South America, Chile had a large contract with Mauser, but it fell apart and some rifles are thought to have gone to other SA countries.
This is a very complex subject and probably (unless Jon wants to comment) best answered by searches on TP's Gunboards-Mauser, John Wall and Jon Speed and others have done considerable work on the subject. Much of it bantered about on Gunboards...
While my interest are military, I do follow SM variations and S-M 1924 siderails and 1933 dated are not common, only three recorded:
1933 MauserBanner 27865 SM1924
1933 MauserBanner 36931 SM1924 SM conf. Koblenz (98k Prop book)
1933 MauserBanner 45365 SM1924 (Chinese markings on stock)
There are many oddballs, queers and one offs with almost unique features, no telling the story of these, needless to say trying to explain it all... Jon Speed is probably the only one alive that could do it, but even still, so much is lost and 1929-1936 Germany was not the most transparent country in the world (though no government is transparent, the more authoritarian the least they are..) I doubt anyone could really sort it out completely.