Help with CZ 27 markings

[JBBOOKS]

I am in the process of acquiring a CZ 27 pistol. It was made in 1928 serial number 1346 chambered in .32 ACP. The right side of the fame is marked CS. Straz Praha. Can anyone ID this inscription. Not sure if this is a Police or military marking. Thanks in advance

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[rcathey]

Looks like that translates to “Prague Guard.” According only to Google translate.
So I would say it’s a police marking.