"Comprises an outer head assembly (P/N 12309649), eye cup (P/N 10692258), seal (P/N 12309663-6), plate (P/N 12309710), four screws (P/N MS16995-51), four washers (P/N M235338-139), four additional washers (P/N NAS620C-416), and a telescope assembly (P/N 12309657).