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That would be how I perceive it as well, but it is hard to know for sure without firm knowledge.
If anyone had access to records showing when the different logos were used we would know for sure.

Sorry, not a great pic I'm afraid:

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Tail seems to be shorter and fatter than on yours, but not easy to get a clear impression from the pics.



Well - you bought it :)

I am afraid I do not have any solid knowledge on this matter. However, my John Barber has a different logo:

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I am not sure, but it seems likely they changed/elaborated the square/logo in...