I found a NOS, never sold, but ridden 1975 Merc Snow Twister 440 L/C. I saw it in a corner of a local Mercury dealer. I asked about it, and found out that the machine was never sold. They have had the sled since fall of 1974. The dealer ship has been in the same family for well over 50 years. I believe there story, as I know the people personally. As I under stand, one of the service techs got it running last year and did a run across the lake and siezed the motor. Suspect bad crank seals. I asked about selling it, they won't do it, but do plan on restoring to Original condition and setting on display. The seat is cracked, and the chrome shocks are rusted but the hood and tunnel looks great. If I can sneek some photos I will post. Al