Case measures 30mm lug to lug x 24mm non inclusive of the Crown using Calipers.
White Dial shows Radium(?) Arabic numerals, Black printed registers and Bulova signature.
Hour and Minute Hands are 'Cathedral' style and a Modern style Seconds Hand shows on a sub-Dial fully obscuring the 6.
Hinged Caseback is stamped as shown.
Vintage display ad is Dated 1928.
*all apologies for the lack of images, Camera malfunction.