I had a response from JM:
"We do not have this 45 anymore so I can't check, it is A&M distributed so there will be other variations across the country"
I've noticed that Discogs now includes this label variation (I'm sure this wasn't there before). I think the information was added a few days ago by kwlstuf.
I didn't see Woodbutchers last post asking for info on what's happened to JM's YT channel so I can't comment.
Regarding the original topic, I am now convinced my copy is an authentic 1966 east coast stock issue, Thanks to all for your contributions.
Regards Kilo