the serial number that tells the date is inside of watch where you can see the mechanism, should be near the top and should be only a six digit number. regardless Columbia quit making pocket watches in 1901. I think they started making watches in 1874. Google "Columbus watch company" you should find all you need.
Men's pocket watch serial 1009277 how old
American Waltham pocket watch serial number 8017000
Dennison watch serial number is 678354
All 14K gold pocket watch, possibly early 1900's serial # X3873?
4029975 burlington pocket watch 100 years or older what is it worth
serial #9019268, #1 oresilver, 15 jewel pocket watch, american waltham watch co.
what is the value of a lady Racine pocket watch. serial number 1286565
I would like to know the value of this pocket watch. Thanks
580926 serial no. CWC Co Gold Pocket Watch 1048 SM
waltham pocket watchserial number 13290396
1,000,000,000
You cannot always identify a pocket watch size by it's serial number but you can by measuring it. See this web site for inches to size designation.