You'll need to find a chainsaw that accepts that bar, perhaps your boss will know or one of the chaps on here can advise? Also make sure the bar is straight and the groove not worn out or it may not cut straight. From what I could see of the chain it doesn't look like the chain had much use before it stopped being used. Maybe the chain can tell you what the chainsaw should be ie does it have "Stihl" stamped on it or any other markings. I'm assuming you have to provide the saw?