If there are no other markings then it will be difficult to tell if it was made for any particular country. Without more pictures it will be difficult to even tell if it is pre-war or post-war manufacture. However, there is a slight hint in the provided picture (the pistol grip shap) that hints at post-war production. Serial number is not helpful in determining date of manufacture nor country of issue.
Here's another picture. It may very well be postwar. The fellow purchased it from claimed to have brought it back from WWII along with two CZ 27's. He may have been a bit "confused" about the time frame.
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