Rubiayat with updated bracelet. Great condition for its age.
There's P. Droz, Favre, and maybe another which I don't remember right now. The key point of discussion/contension is having Bulova stamped on the movement in addition to these other makers.
I'm good with Rubiayat on the ID for this one. We have other similar. The year...well it's gotta be close.
The Year of manufacture is debateable.
We see these early American Standard Cases with a Globe Hallmark or a Shield.
I will suggest the Shield is post 1920 and the Globe pre.
The name 'American Standard' being documented as in use from 1918, the Amercan Standard Watch Case Co. founded in 1920.
Let's investigate that theory as I like it. I'm also looking into the case serial numbers after the first number which is always '1' for these early watches. I'm wondering if the numbers simply incremented as they made then. Starting at 100001 and going to 199999 before they moved to the standard we see of putting the year as the first number. Just a thought.