I have this Sheaffer Flat Top Lady with features that are difficult to explain. The pen is 4.5" long and marked "Lady" on the nib. The single tone nib and pinned lever are early 1930s Flat Top features while the humped flat ball clip suggest 1934 or later. The third line of the barrel imprint has the common "DEC 10.12-JAN. 27-OCT. 20 - NOV. 24" patent dates. The feed is flat serrated, with broad and widely spaced notches. There is no white dot on this pen. Is this a correct cap and barrel combination? The absence of the white dot seems odd.