Hoping for a little help on this one. I'm not very familiar with pocket watches but i have a couple of size 18 Walthams here. One is a model 1883 with an 825 - 17 jewell movement & a "Banner" case from 1912 and the other is a model 1892 lever set with an 845 - 21 jewell movement and an Empress case from 1913. The first belonged to my great-grandfather and the 2nd to my grandfather. The 1883 seems to run well & is very clean although the case shows signs of heavy wear. The 1892 is missing the sub-second hand but appears to run, is very clean and again exhibits significant case wear.
I've tried to do some reading up on these old Walthams but i'm not finding much info on the case manufacturers, the case material (are they gold filled or ??) as i can't find any identification marks and most importantly, what size hands do i need replace the missing seconds hand on the 1892?