??? I must be missing something. Where'd that Serial No. come from? Is it supposed to be from the Rumble 150? If so, there must be another decoder somewhere for modern amps made after 2000, 'cause the all-tube 300 watt Custom Shop Rumble is the only one made in the '90s.
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(as long as I ain't gots to move it)
I will try to do better in the future and not let it happen again.