Mesa Serial Number Lookup
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Devan wrote: Hey all, I bought this amp on eBay some years back. I always thought it was a IIB model based on information at hand. Then today, I get an comment from a guy who saw it on a Youtube clip of mine and he said it is a IIC model because of the pull switch on the bass knob. Can any Mesa/Boogie experts clarify this for me? I think Joe has a few of these amps himself. Here are some shots I took a couple of years back. Hey Devan, AFIK the 5 band EQ and Reverb were options so some have them and some don't.
Here's some Mesa Mark info for ya. Devan wrote: Thank you rhythmplaya!
According to those lists, my serial number makes it a IIC?? 
Bob13 - You have to post pics of YOURS now! Stefan - for sure dude!
Here are some shots of the back of the amp. I assume the stamped number under the words 'SPEAKERS' and above 'Mesa Boogie Ltd.' Is the serial number?
If so, the S/N is 11779. No '+' sign above the power cord to designate it a IIC+, but what the heck is that squiggle UNDER the power cord inlet?
Is it a '-B'?? Devan I wouldn't even know where to begin to post pictures on-line. It took me 3 years to figure out how to do an avatar.
Morning again all. Just checking back in to update everyone on this amp. The experts over at TGP looked over the photos too, and from that, the conclusion is that this is a 1984 MkIIC amp, hand built by Mike Benadelli at Mesa. Mike still works there apparently, and still does work on the MkII amps that are sent back there for refurbishing etc. I had always loved these amps ever since seeing that ad in Guitar Player magazine back in the late 70's, early 80's of Carlos Santana rocking out next to a wicker grille MkI on his Ibanez (or was it Yamaha?) guitar. When I was gigging back then though, I could never afford one so used to beg, borrow and steal amps for gigs.
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Finally, about 5 years ago, I saw this one come up for sale on eBay here in Aus. Had to have it even though my gigging days are long over. Just to fulfil a teenage dream, LOL. After posting these pics yesterday, I was inspired to fire it up and just plug my Strat straight in and played for about 30 minutes, enjoying the simple, pure, clean tones from this little wondrous box of tone.
Mesa Boogie Serial Number Lookup
Thanks for the feedback and help everyone!