Late 1936 bottom stamp
		Rounded corner model with metallique
		Coil spring was changed to humped cam spring.
		Machine engraving model (1941 steel case)
		1942 Chrome-platng model
		Black crackle model (four barrel and three barrel)
		Variation of three barrel hinge and 1943 insert
		Black Crackel with wrong patent number (#203695)
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