This watch belonged to my grandmother (she passed in 1994) and I don't know much about it.
I have taken it to a couple of jewelers/watch people and didn't get much information except what was on the inside.
Marks that are on the inside: Swiss / 5AB / Seventeen Jewels / RS AF / BXW
On the inside 'side' on the back is: XVIXVI
On the inside of the back are jewelers marks for repairs with the earliest being 1952.
The band is expandable (no latch), and has 3 sections that say " pat pend multi size" - i do not know if it is the original band.
I want to be educated about the watch! So I am looking for any further information about the watch such as the exact year and what all the writing is.
* * * I did set the time and wind the watch (not much) and it kept exact time for 3 hours - until it was opened at a jeweler.