I recently acquired a '66 Showman a few months ago. I've been using it with an 8 Ohm cab, assuming that all Showmans have 8 Ohm OTs and Dual Showmans have 4 Ohm OTs. While trying to educate myself a bit more on the Showman's history, I stumbled on an web article on that states Fender made Showmans with both 4 & 8 Ohm OTs, depending on what speaker cab was paired with it. The article also states that if the OT has the number 125A29A (which mine does), it is 4 Ohms. Is the article correct? Is mine in fact 4 Ohms? Will it damage the amp running it with an 8 Ohm cab? Thanks for any help!