Fred Locke made three different helmet stiles during the 1902-1904 time frame . The unit on the left is the only one that appears in his catalogues as #47 . The origin or reason for the production of the other two is unknown but all are scarce to rare . All three were made in a two part mould and have a mould line that splits the ears in half extending from skirt edge to skirt edge . Left to right U-380, U-380a, U-383