Old ladies' Hamiltons, that is. I thought I'd show off my collection so far.
In the late 1910s, Hamilton introduced a ladies pocket watch with closed lugs at the top and bottom so that you could attach a bracelet (included with purchase) and wear it as a wristwatch. I think these were sold until 1924. The movement serial number dates this one to 1923:
Around this time, Hamilton offered closed-lug versions sold on ribbon straps. They were available in round, tonneau, cushion, and decagon shapes; each shape was offered as either a plain case or an engraved one. Both of these are dated to 1925:
I've also got one with the cushion shape but the tonneau dial and engraving pattern. Quite puzzled by that one...
Moving forward a few years, the Wellesley dates to the early 1930s. I haven't cracked the case on this one to get the serial number.
(the dial is actually in great shape - the crystal, not so much)
We'll end in 1939, with one of the few black-dialed ladies' watches offered by Hamilton in the pre-Swiss days. This is a Leta: