Any branded (Agfa, Voigtländer, B&W...) push-on filter marked 37mm from the 50s should be just fine. These push-on filters usually have tongues on the mount side that can be bent to make them fit snuggly. This is true for all the Agfa, Voigtländer, Zeiss (E-Germany) and B&W push on filters I own. Any of these in 37mm will fit a Bessa II (and a Record III) without problems. The only exception are the Kodak Retina filters which use a confusing system of denominating the filter size. But I am not aware of any Retina filters in 37mm anyhow. The Agfa and B&W filters are usually easiest to find in 37mm, the Voigtländer filters are the best (even available coated) but are bit more scarce.
Originally Posted by 250swb