Madill 046 hoist on a Skagit T-110HD 8-guyline 110' tower/trailer. Commonly called a 'Skadill' as a few of these were built.

According to my Madill bible here, Construction Number 43072 was the 3rd Madill 046 built, and was mounted on an M4A3bottom.
She had the standard Madill 90' Spar S/N 45016, 8-guylines, and had a Caterpillar 1693 engine- S/N 65B419.

The machine was built in September and delivered in August of 1968 to Klukwan Forest Products at ketchikan Alaska.
It is shown in the 'Life of the Alaska Loggers' movie filmed at Long Island in 1985 and in the film is still on the tank.