Look at your Kingslake. Here is a synopsis.
1928
Howard Beach, of Buffalo, NY, designed an attachment to introduce spherical aberration to a lens, in order to increase the sense of depth of field. It was made of plane glass, one side having an aspheric surface.
He also made lenses of a Tessar type with a hand polished, aspheric, front surface.
These lenses, literally Tessars with intentional spherical abberation, were sold by... Wollensak.
The were called Multifocal because the scene was only sharply imaged by one zone of the lens, or wavelength of light, while all other wavelengths of light, and other zones of the lens, produced superimposed images to some degree or other out of focus and less likely to be exposed on the film.
In this regard, the Beach was kin to the Imagon, Pinkham & Smith, and Nikola Perscheid. Stopping the lens down corrects the spherical aberration.
Too bad. Another fine portrait lens. I know a couple still working for a living.
don