Do pocket watches exist, how much do they cost and how much do they weigh in D&D in the worlds of classic fantasy such as Faerûn, Dragonlance(Krynn), or Greyhawk? I am interested in the "in-universe" ability to track time up to a minute.
I have found the following comment of Ed Greenwood on sageadvice. According to that, after the Spellplague the use of water-clocks began to spread and large, cumbersome commercial water-clocks costs at least 1000 gp. Ed Greenwood also pointed out that rich merchants, nobles and busy warehousekeepers use pocket watches most often in the Realms; it is customary to wear those watches on a chain around the neck, not on the wrist. I could not find the recommended price and weight for a pocket watch in the official materials.
Editions from 2nd to 5th are of interest. If you manage to find this information, please mention to which edition the material that contains it belongs, if possible. Thanks.