This was the last of the Poulan pro grade saws. Pretty much the designs from the P-series Pioneer saws rebadged and in a few cases a couple changes. They had Dolmar make the 5500 and 6000 (Dolmar 144, 152 and 153) to take up a gap in the upper cc range saws which Poulan only had one with the 655 and later 655BP. They carried a couple series of saws from Pioneer and from their own series of saws but that was not to last. I think the merger or buy out was just to stream line production and take the customer base from both to try to secure a share in the market that was being taken over by Stihl, Husqvarna, Dolmar and Jonsered. The saws under the Poulan PRO name were top notch and had a following, but they were either not able to keep up or just sold out like most other companies were doing in the mid to late 1980's.