USN Leather Flying Helmet NAF 1092-71 help

I found this flying helmet at a local antiques shop and trying to research the inscriptions. The helmet is a "NAF 1092-71" and the names look like "R.C. Crensa?w" and "J.R. Caufield" with "A. 12 43" next to Caufield. Does anyone know what "A. 12 43" represents?


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