I have a 1967 Ford 4500.

I do not know how to read the hour meter. Left side of the meter, there are 4 digits in black.then 2 digits in white. These are not digital numbers. they are on a wheel.
When I purchased this used machine the meter read: 4742 in black & 31 in white.Currently the meter reads: 4900 28 So doing the math am I correct ntosay that in the8 years that I have owned this machine I added 157.97Hours?

I have a 1967 Ford 4500.