congratulations! the serial numbers on mine are 641 and 848...they look exactly like the pair I have....maybe the throats on yours are a little better? I spent at least 8 hours slowly grinding and filling and priming them...and it was a real pain...but they sound fantastic! When the us postal service gets its act together I'm looking forward to converting a set of 511b's...and then getting my motorcycle buddy to paint em up like a harley roadster...ya know have a little fun with this hot rod hobby without wheels.
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