Guys,
Been wondering the same thing.
I'm thinking maby the last 3 digits, in my case 4 would make 9770 units, that seems a bit high, 770 sounds like a more realistic number?? If there were nearly 10,000 bighorns running arround, seems like we would be bumping into them allover the place. But thats a guess. ChopperBill whats your last 4? Ours is about a year old now.
TimK