Gordon Couger writes

One of the openers on John Deere grain drills is well over 100 years old
with no changes but ball bearings and better steels.

Good job you didn't post on uba as someone would likely chip in to say
their drill was over 100 years old.

Mind you shovel and hoe design is even earlier.

--
Oz
This post is worth absolutely nothing and is probably fallacious.
Note: soon (maybe already) only posts via despammed.com will be accepted.