[Help] Great Grandpa’s Briggs and Stratton

Hey everyone, I’m new here. I’m trying to figure out what kind of Briggs and Stratton engine I have. My dad gave it to me, and he got it from his grandpa when he was my age. I know there should be a placard somewhere giving details on the engine but that has been lost to time. Is anyone able to tell me what type of engine I have?