Well, I am learning which of these watches need service and/or adjustment.
The Crescent Street which I entered has dropped out of the running; 6 min slow after 3 weeks. Probably needs service. Dunno when it was last cleaned.

The Waltham 15j model 1879 is something like 15 sec fast. Made in 1900. It was last serviced in 1988. Looks like this is my best timekeeper among the pocket watches I have.

The Bunn Special 60 hr 21j which I got cheaply a month ago is 6 min slow, but the seller had no idea when it was serviced, it had been in a drawer as long as he could remember. Looks like a nice clean movement, however. It has a plastic crystal which is slightly discolored; it should get a new glass.

By my computer is a Bulova railroad approved wristwatch, bought about 1960, the battery replaced about 8 months ago, and within 15 seconds (Approximate only; I am reading time on my computer, I haven't used the time signal).