I have heard that the shtreimel and kapote (and variations) were mostly worn only by the Rebbes, while most followers were too poor for a beaver-skin hat; most hassidim wore the ordinary clothes of their area (with tsitsis and head-covering).
Also, though most male Hassidim were not clean-shaven, most of them didn't go for the full-on beard but rather less hairy variants.
Of course, the standard Haredi/Litvish getup today, with suit and hat, and sometimes clean-shaven or with a short beard, is fairly ordinary clothing for 1930's Warsaw, so I am not referring to that, but rather to the distinctive Hassidic look.
Or did most Hassidic men really dress in the beaver hat, robe (sometimes striped), knee-stockings, etc.?