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Cranks in three options: square, half-round and fluted. Fluted cranks top quality forged right crank one piece. Pre-war special flush fitting cotterpins and dureel fixed sprockets Cranks made in non-gearcase clearance (NGCC) also made in gearcase clearance (GCG) Until 1954 all Williams cranks used the screw square bolt method of attachment (also used by BSA).
Rings driven by bosses on ring not chainring bolts, better design than Chater-Lea. With the introduction of the C45 a larger splined hexagonal sleeve fitting was introduced .
We found a very early Paramount – claimed to be a 1938-9 vintage – with serial number A545.