LISTER PETTER AB1 DIESEL GENERATOR 3000RPM MODEL. I BOUGHT THIS AS A NONE RUNNER FROM A LOCAL GUY AFTER MUCH INVESTIGATION-TESTING THE PROBLEM HE & I HAD TURNED OUT TO BE A STICKING & MALADJUSTED INJECTOR (THEY NORMALLY TELL YOU NEVER TO TOUCH THEM) BUT AFTER SOME CAREFUL-GRADUAL TRAIL AND ERROR TESTING & ADJUSTMENTS SHE NOW STARTS AND RUNS VERY WELL. Not sure of it's age as yet these were made from the 60's until the 1980's apparently. May be a good ideal to enclose it in soundproofing board! but it is an Industrial type I guess. The last owner used it when installing custom steel fencing & gates etc,to power hammer drills angle grinders etc.