Originally Posted by madaxeman
...The fat, warm thick tones that jubilees are renound for was introduced about a third the way through the 87 run. So if it is a silver you might want to check it's the later design if that's the sound you're after...
Did this circuit revision overlap into the black tolex 2550's from '88? I had one of them years ago and it sounded just like you described: fat, warm, & thick.