1928 Patricia
full ad http://www.mybulova.com/sites/default/files/vintage_ads/1928-AD2-(Feb-11).jpg
Nice Patricia.
I noticed how subject 1928 Patricia's "rolled gold plate" case signature is arranged differently from some Ladies RGP case signatures from 1927, like in this 1927 Minerva (housing a 1927 date coded mvnt).
Also noted how this '28 Patricia case signature is arranged differently from some 1927 mens case signatures for RGP- like in this 1927 Spartan case signature (housing a 1927 date coded mvnt).
The difference in patent dates reflects the smaller ladies using one dust-tite technology (1924) and the mens using another (larger???) dust-tite technology (1927). We use to use these case signature differences to help with dating cases before Fifth figured out the first digit of case serial number correlation a few years ago.