An officer of the Finnish Army
This is the officer's pattern tunic of the Finnish Army in WW2. The collar badges denote rank, in this case a junior Lieutenant, as shown by the single heraldic rose. The green color and the silver Gray border, along with the green piping on the shoulder strap, with the crossed rifles badge denotes infantry.
Also featured is the Finnish Sam Browne belt with a cross strap and pistol holster.