Survivor late model 930 super, 175 psi compression on a gauge that reads about 20 psi low. Runs awesome. Has the rare 8 mm conversion studs so you can run large husky mount bar. Can get piston pic if anyone wants one but take my word for it, not many come up for sale in this shape. If you are a jonsered guy, you know what this saw is. Looking to get 500$ Pho Shipped lower 48 and I'll throw in a box of misc. spare parts from a 910. The saw sits and I have no use for it and I need the cash are the only reasons I am selling. I went through the entire saw and made sure everything was good and working.