All are hard bound and each about 300-500 pages

I can take a few sample page shots if one tickles your fancy. These aren’t vanity press jobs or biographies they are nuts and bolts (or hairsprings and gears) content.
For example, Wristwatches (2nd in photo) copyright 1988 which isn’t a problem when covering ~ 100 years.


Or the 4th book Wristwatches in 3 languages, a survey of brands

Mike