Weimar Era P.08 - Unit marking help

[photo-war]

Hello! Please help to find out what units were coded by these markings on P.08. Gun was produced in 1917 hence both abbreviations are not Imperial period, and there is 1920 stamped on receiver, that indicates that it saw service in Reichswehr. Note that first code was overstriked when this gun went to another unit. My only guess that S. stand for Sanitats (or Sächsische ) – what about the rest?

S.C.I. 2. 17
S.Ka.I. 113

Thanks in advance for any help with this!
Best regards,
Alexander

[GWA]

The first marking which has been crossed out is Schutzpolizei Cassel, First Centurian, weapon 2. I assume that the second marking is Schutzpolizei Kassel, First Centurian, weapon 113. Right after WWI many German spellings and words were "Germanized".

[photo-war]

The first marking which has been crossed out is Schutzpolizei Cassel, First Centurian, weapon 2. I assume that the second marking is Schutzpolizei Kassel, First Centurian, weapon 113. Right after WWI many German spellings and words were "Germanized".

GWA thank you very much!!! Great details!