Hi Pete and all -
Yes, I feel the blue one is an important machine that should be preserved.

The 'rope method' on slopes is still practiced today.
It replaced the extra-long handles used on push mowers.
Today, remote controlled or extended-arm mowers are used on extreme angle slopes.
But line trimmers seem to have become the fashion for smaller-area slopes.

I should add that these 2-strokes originate in Power Products, not Tecumseh.
The designs gave competent engines to these applications.
These engines were used world-wide, and I feel they are of very competent design.

Cheers
-----------------
Jack