A good first pocket watch is less about the name on the dial than about honesty: an original movement, a case that belongs to it, and a clear service history.
Start with the movement. Ask for a photograph with the case back open. The serial number on the movement should match the period of the case, and the jewels, balance and hairspring should look undisturbed.
Then look at the case. Hallmarks on a gold or silver case tell you where and when it was assayed. Worn hinges and dents are normal; a mismatched bow or a replaced crystal should be in the condition report.
Finally, the paperwork. Original boxes and receipts add value, but a recent service invoice is often worth more to a buyer who wants to wear the watch.