With a serial number of around 8*** you really can't consider that an 'early dual'. Mine barely qualifies and it is a rev F in the 2000s. Yours is a rev G which is a great amp but NOT an early dual. Maybe consider listing it as a 2 channel Dual Rectifier? I'd also consider blotting out the last two numbers of the photo that has the serial number in it. You don't want that getting into the wrong hands.