For the advanced collector, my running, Sachs KMS4 Rotary. This saw had a few hours put on it back in the 70's. The original owner said it was too heavy and when he finished the project, never used it again. When I got it I primed it and it fired right off. The fuel tank looked new inside so I put half a tank in it. Primed it again and it started running, drawing from the tank. I shot a short video of it running. Mark hooked me up with a repro knuckle guard, it's not on the saw, but does go with it. $2000 shipping included. My daughter just had twins, so we are running in and out. Please respond with a PM, so I can keep track of reply's. Thanks, Joe.