On the page: https://www.familysearch.org/search/catalog/698087?availability=Family%20History%20Library the first microfilm is entitled "Index to births, ca. 1874-1956 Register of births, v. 1-3, 1905-1915 Register of births, v. 4 (to p. 98), 1915-1917". However the microfilm itself is "California County Naturalizations, 1831-1985". Please put the right microfilm on this. Many thanks.
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If you look at the catalogue entry you have linked above, you will see that "Index to births, ca. 1874-1956 Register of births, v. 1-3, 1905-1915 Register of births, v. 4 (to p. 98), 1915-1917" is items 2-6 on the microfilm. There is another microfilm that is item 1 seen on this catalogue entry https://www.familysearch.org/search/catalog/698059 - Naturalization records. To get to items 2-6 you will need to scroll to the end of item 1 and to the beginning of item 2.
I did not check out the images, but it seems to me likely that the catalogue entry is correct.0