 Fender's 1963 product flyer featured a flat logo, black Tolex amp, while their 1963 full-line catalog showed a raised logo amp on the cover, both with a grey Saran grill.The first production Twin Reverb models used an unusual 7355 power tube (weaker cousin to the 6L6) as with their concurrent smooth blonde, blackface Fender Showman amplifier.During this time the amplifier's output was rated at 85 watts into a 4-ohm speaker load.