I was just reading about Kaiser on Allpar, a brand I admittedly know next to nothing about. I was just noticing some of the interesting bodywork for the 50's. There's the now ubiquitous kink in the C pillar, the dip in the belt line in the rear door, and (something I'm not sure I've seen elsewhere) a widow's peak over the windshield. Other photos show that some Kaisers also had a widow's peak over the back window.
Upon closer inspection, the dip appears to be more visual trickery with chrome trim and creased sheet metal than an actual dip.