Looks like a Brno 21 with an aftermarket trigger. Most likely you will find a date stamped on the left side of the barrel indicating the year of manufacture. It will be a 49 or later due to the integral mounts. A fine rifle.
ddj
Many men go fishing all their lives without knowing that it is not fish they are after. - Henry David Thoreau
The best part of hunting and fishing was the thinking about going and the talking about it after you got back. - Robert Ruark
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