I think it must have been Willie who took the watch from my grandad after John Morris died. I just spoke to my dad who says he thought his his uncle was called Bill.
So yes I think they had different fathers, although my grandad always used the name Morris and was unaware that John Morris was not his father until the birth cert was brought up. I think that the copy I have of his birth cert (without looking to be certain) is date stamped 1937 which i think is about the year my grandad got married. On the marriage cert it lists John Benjamin Morris as his father, but he is diseased.
I think that this discovery has created a lot more questions than answers!!! The plot thickens!!!