Ten hour pocket watch?

[Erincrissman]

I have two identical low end watches that have ten hours and 100 seconds. I am thinking that these might be billable hours watches? Is that correct? They are from the early 20th century probably not later than 1930. The only marking is a printed A.P. Co on the face inside a diamond. Don't need to know a lot, just what they were used for.

Thanks everyone!

Erin.
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[Tom McIntyre]

Do the watches run? They may be chronographs instead of watches. Pedometers also have that dial style if I am visualizing correctly.

Perhaps you could post a picture.

[Erincrissman]

I like the pedometer suggestion especially since there is no winder and that giant weight in the back. Why would it have a "faster/slower" adjustment? Again, I have no idea what I am talking about here. Thanks everyone!
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[Tom McIntyre]

This device is a pedometer. You can use the device inside to adjust it to your average stride and it will tell you how far you have walked.

People use GPS for that nowadays.

[Kent]

... it will tell you how far you have walked. ...

Tom: Would that be in miles, or kilometers?

[Dave Coatsworth]

These are '100 mile' pedometers. The main dial registers 10 miles, the small dial registers 100. The adjustment inside should be in inches and is roughly the wearer's stride length. This particular one was made by the American Pedometer Company of New Haven, Conn.