Welcome aboard,

But it is a safe bet , that The Type S is a Röll Mauser. As Kuduae stated above it lacks the staghorn proof mark on the receiver.

The number -if you follow J.Speeds book - also will identify it as an "occupation" Mauser.

An added sign ( at least to my personal experience) is the reddish extractor you will find on nearly all Röll Mauser´s.