This is indicated by the white arrow pointing in the direction in which the film is inserted into the spool. Might fit early IIIf with no ST designation. SVOOP is supposed to be 14021, but this NOT a spring loaded spool. Could be a SPULA, an earlier spool that was made from 1931-55 and fit earlier cameras. The spools has light surface corrosion from being in box so long.
This information may not be totally right for you. Please check measurements before purchasing. I make every effort to accurately describe items and take careful photos. There are more interesting items in my store.NEW LEICA FILM SPOOL 14021 SVOOP 1940'S RANGEFINDER I, II, III CAMERAS" is in sale since Monday, November 26, 2018. This item is in the category "Cameras & Photo\Vintage Movie & Photography\Vintage Cameras\Rangefinder Cameras". The seller is "paulaberliner" and is located in Redmond, Washington.
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