This snowmobile is Model P17HSM. It has a Factory Mod Hirth single cylinder engine. I am not certain of everything that went into making this a Factory Mod engine but do know that a megaphone exhaust came from the factory. The chassis closely resembles the P10 Panther that was offered in 1969 as it does not have the rear mounted gas tank. The seat also differs in shape and color from the more common 1969 Panthers. It is published that 187 of this model Panther was produced. This snowmobile was sold brand new by my Dads dealership to a man from Mora MN. The sleds owner raced it for a few seasons out of my Dads store. We have pictures of this sled from the summer of 1969 showing its owner and a lot of trophies. My Dad has told stories of this sled competing really well not only in the single-cylinder classes but also when it was jumped up into classes with more powerfull snowmobiles, he said this was especially true on tight winding race courses. I aquired this snowmobile at a local farm auction in the spring of 2002. The second owner had removed the original megaphone to make it more trail-friendly but I was able to locate another and install it back on the original mounts. The seat cover was showing wear and I have had it recovered to original, this Panther model did not use the leopard-print material. The names, race stickers, numbers, etc on the hood are all original. It is in running/operating condition.