I agree, probably a no 4.
Interestingly enough I stumbled over another bell mounted like this (at a cemetery). I hope to go back and get a photo of it for this posting (obviously wasn’t the time to do it before). Bell is a smaller one.
nos 1 2 and 3 yoke arms are shorter and A frame stands are shorter. The mouth of the bell would rub the stands. Stands can be designed to fit though. I have made my own from designing wood patterns and made them work on the smaller bells.