That roped you in, didn't it 😃 I picked this up off the counter in a tip shop (resource recycling centre, to use its proper name) today. I've never seen a mechanical pedometer before, and imagine it's a long time since Heuer was making them. I thought some of you might like to take a look inside.
Made in Germany.
Check out that dial 😃
"Bumper" at 11 moves the finger at 1, which drives the "index wheel" at 4. This finger/index wheel setup looks sort of like how an Accutron index wheel works I think. The other fine finger at 7 that contacts the wheel stops it from going backwards when the first finger disconnects.
Lots of gears inside.
It wasn't working and I figured out the first finger wasn't contacting the wheel when you moved the bumper. A little extra tension added to the finger and the wheel is now advancing properly and so are the hands on the dial. How accurate is it? No idea.