1901 Waltham American Pocketwatch, 15 jewel.

Antique Waltham Wind-up Pocket watch with removable crystal and back.  The video shows the movement of the second hand and watch is ticking, but I'm not able to adjust time.  Crown and spring need adjustment or maybe lever type to set time. not familiar with the mechanics of manual wind.  need to take to jeweler for maintenance or any necessary adjustments.   I can set the time with the crown, but it's easily unsets. I've removed the crystal and don't see a lever on outside of numbers.  I won't go into the inner workings since I Don't know anything about watches.  Good Vintage Condition for Watch Collector.  A few scratches, minimal evidence of use. Acquired from grandfather who received after working many years for L&N Railroad.  The serial number on the movement has been verified as accurate.   The serial number on watch case verifies it to be from the Star Watch Case Company.