That's a Finnish army issued CZ-38 in .380 - very unique gun, it's quite large but it's an unlocked breech .380, has a DAO trigger with an external hammer, heel mag release but no slide lock (and it's a bitch to pull out the mag when it's holding back the slide, let me tell you).
If you press the catch on the left of the frame you can lift the slide right off the frame - the barrel is hinged at the front and stays attached to the pistol and it has a captive mainspring - makes for a half second field strip. Here it is with my Finn Luger.
