Disappearing 717 Skagits
Thanks Mr. Furpo, you are correct, that is not one of the 717's from northern Cal. Both of these were on tanks, and the cab was much like, if not exactly like the standard Skagit cab with the leaned forward front windshield.
The search goes on..........
On that BU70, that "back drum" being your haulback would become the skidline if you were to skyline with it. If it had the skidline fairlead in the tower, just thread the haulback through and you are in em! I ran a BU90 like that for several years.
I can't see from the picture if the haulback drum is over or underwound, probable over. It makes a difference, in a hard pull there was a good chance it may lift the back outrigger pads off their blocking. The BU90 did this quite a bit, not enough weight and too much leverage. Anyway, she sure is a sweet looking tower. Half a world away, and I'm drooling........