miniature ladies watch from 1941 are less than 20 mm and have an interesting design, crystall is like a magnifying glass, but unfortunately I did not find any advert
Perhaps this is the famous "Gumball" watch?? LOL
Interesting little watch Jaroslav, we have another in the dB.I kind of like it.
http://www.mybulova.com/watches/1939-unknown-5738
Unknown.
Interesting look and design for the period, Unknown
Unknown for now. I've seen these before, I was sure we had an example, but nada.
Unknown... I don't know that I've seen the half gumball before.. haha.
I've seen this unknown a few times over the years....
Looking at the "ball" near the ends of the bracelet, I'm wondering if the bracelet may be original to the watch.
Another Perishere newly identfied with this latest ad.

Perisphere works for me.
1941 Bulova Perisphere
good call !
1941 Bulova Perisphere