That is a nice Loewe made model 1893 Spanish Mauser. It is unlikely a SAW "captured" Mauser.

One of the photos shows the rifle's rear-sight slide. It is a slide developed by Oviedo Arsenal, in a later time period. These slides replaced the original German design that was in use during the SAW period.

This retrofit work was done in Spain.

The presence of the Oviedo sight-slide makes it very likely, even if rifle #C1936 was used during the SAW, it went back to Spain and was not a "captured" rifle.

(BTW - My Loewe model 1893 Spanish Mauser came with an Oviedo sight-slide. The Oviedo designed slide was numbered to match the last three digits of my Loewe rifle's serial number).