Antique catholic 3D picture of Peter and Paul from the Czech Republic

Hello, I have a picture and frame that I purchased here in Germany that is what I believe is a 1950s circa catholic 3D with Saint Peter and Paul painted on the glass and with Jesus, Mary and Joseph figures in the middle of the picture that is set back and makes a 3D type setting. The frame has a few nicks and scratches but appears to be in good condition. The frame itself wood with leaves and vines in gold color. There is a stamp on the back that I cannot make out but a professional like yourself might know. The picture is approximatley 3 feet tall, 2 feet wide and about 6 inches deep.