Thanks stevej.I think your right about the first picture.The 2nd picture is a model 4 & 5 motor.Which I have plenty of.Even have spares of those lads.The last picture is exactly what I'm after and it would have the Model 2A,3,4 & 5 crankcase.But the numbers I'm trying to find would have letters in front of them. Thanks again stevej I should have thought about putting engine pictures up.I just don't think I have a complete one to show.I guess that why I need them.