Late 70's model. I believe its a 1978. I've owned it since about 1985. It's seen hundreds of gigs but is in amazingly good shape. The side handles were missing when I bought it and I eventually put the newer style handles on it. The power section caps were just replaced along with input jacks, potentiometers, power switch and resistors changed to metal film. The power tubes are winged C 6550. They're not new but the amp has seen very little use since new and check good on my tube tester. Most preamp tubes are new or NOS. One of the preamp tube cover screws is missing as you can see in the photo's. Overall it's in really good shape for as old as it is. This is a true collectors item. I know I'm going to regret selling it but I have to make room. The price is $1600 shipped to US lower 48 only.