This is a Bulova Ladies Sport watch in 14K Gold Filled with Ruby, Jade and Black enamel inlay.
The naming is confusing due to Bulova Ad (see 2nd upload)
Bulova states: "Introducing the Bulova LIDO" , however, they gave each watch another name. My watch is the "YVETTE".
In reply to I love these watches - this by Geoff Baker
To be honest I'm still seeing the Yvette, The drawing may very well not fully show or emphasis the indents, BUT it is extremely close and could be put down to the artists impression/rendering.
I think the angle of the photo is emphasizing the inward curve which might not appear so prominent when viewed head on.
Here is a better image of the advert.
My watch listed is not the Yvette, although it is part of the Lido Collection.
My watch is a: 1928 Unknown
This is a true example of the Yvette:
https://www.watchophilia.com/photogallery/bulovas-1920-1929/a1928-yvette/#!
In reply to Wow. Your watch is close, but by Reverend Rob
I agree Rob. Based on new evidence; case shape certainly appears to be different from the Yvette off site that is referenced that appears to be a dead-on match to ads.
Although it would seem unlikely that 2 models in the same year could be so strikingly similar, it's certainly possible.
I'm back to Generic Lido (as a place holder in the Db) or Unknown as well.
In reply to I agree Rob. Based on new by neetstuf-4-u
In reply to Wow. Your watch is close, but by Reverend Rob