Can anyone please assist me in finding out the model and year of this Bulova watch?

It had belonged to my great grandfather.  The back reads 8-10K Gold Filled.  The band is not original.  As you can see the face is black with gold numbers and hands.  The numbers are not raised.  The watch can be viewd at:  http://www.mybulova.com/watches/1940-other-589

Thank You

I found this watch in my jewelry box and I think it belonged to my grandmother. It has a round face, with raised numbers, and is the old fashion wind up type. From what I can see on the back of the watch, there is what looks like A9 below the name, and directly below at the bottom is 673347. I am not sure if that is the model number or what it is. If some one can help me by telling me what year it was made and what kind of watch it is, I would be greatful.

 According to the watch dating chart for 1924-1949, the "O" mark can indicate any one of three years, 1925, 1934 or 1944.  What other criteria can I use to determine which of the years is correct for my watch.

Thanks to all.

Bob