Electro-Voice T25A question

[dajack761]

I have a question for our esteemed EV historians. I’ve been looking at T25a’s lately and noticed some differences in the labeling. Can you tell me if the differences in labels give some clue to the production date of the driver? See attached photos?

 

[GetBusyLivin]

I love EV. The Regency put horn loaded, highly sensitive speakers on the map for me. I'm no historian but the ones with the silver bell covers I would just put in order of the serial number. The White model came later.

 

[grindstone]

Add that 9BF9blah is the oldest badge style of the 4 to what he said.