Hoping to sell one of my backups to put a bit of $ into my pedalboard. Not sure the year on the Jet. Maybe 64-66. Original except tubes. JJ power tubes. Needs a new replacement 6BK11 or 6C10 (cheaper substitute) tube for the trem but I never use it so haven't bothered. Still has 2 prong power. $375 shipped with PayPal gift. Mesa Studio 22+. I think an 87 but need to verify. All original. In great shape. Not the quietest operating amp but I gig it without issue. No graphic EQ on this one but it sounds great. $480 shipped with PayPal gift. I may have some new Mesa EL-84's around and, if so, I'll include them. Trade interests: Strymon Flint or Bluesky Neunaber Stereo Wet Red Panda Context Mr. Black Supermoon or similar Ditto x2 pedalboard power supply decent volume pedal.