the Calabash pipe was evidently chosen by Actor William Gillette for the 1899 play "Sherlock Holmes" (he also wrote and directed the play), and he wanted a prop that would be large enough to be identified through out the theater. He also gave us the Deerstalker cap, which previously was just a cap with flaps and the Inverness cape, for Halmesian regalia.
By the time of Basil Rathbone film portrayals, of course, the camera could catch a more common sized pipe and it be identified. In the written Holmes the most common reference to a pipe is a "greasy old clay", with the shag cut tobacco in the toe of a Persian slipper.
IF you are setting out to view ALL of the Sherlock films and television shows you have your work cut out for you... there over 250 of them, and that does not count things like episodes of tv shows where they do a pastiche of Holmes & Watson.
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