Stamped into the rear panel near the Mesa Engineering logo on the back panelĭecal on the underside of the chassis near the power tubes and AC in.

Stamped into the rear panel underneath the speaker output jacks. Feel free to call Mesa Customer Service at 7 Monday-Thursday, 9AM-5PM Pacific time for further assistance if this hasn’t taken you right to the serial number information you've been searching for all this time! Amplifierīoth original and Re-Issue amps have a adhesive backed DYMO Label serial number underneath the speaker output jacks If you still can't find the serial number, consider the possibility that a previous owner (or thief) may have removed the serial number decal or obscured a stamped number. If, after reading this material you can’t find your serial number, see the Serial Number By Location table below for more specific detail per amp. For amps built before then, birthdate information may be available on the outside of the chassis near preamp tubes (as shown above) or, inside the chassis which requires disassembly to see the inside) but these dates are not always availablew on every model. Some people like to know the 'birthday' of their amps and many will be pleased to find Mesa techs initialing and dating the amps in plain view very near the serial number decal on the amps since 2008-2009. Mark IIB amplifier with tech initials and assembly date on the underside of the amplifier between preamp and power tubes

Where is my clip studio serial number