Koch , August Christoffel (A C)

SN CORRECTION 25 Aug 2026 (year-prefix method): ServiceNo 77334084BT cleared -- per the documented SA force-number convention (data/SA_SERVICE_NUMBER_NOTES.md), the prefix '77' implies registration circa 1977 (usually age 16), i.e. birth circa 1961. This record's own Age/DateDeath implies birth circa 1913, a mismatch; PersonNumber 31108 (Knoetze, implied birth circa 1962) fits instead. Original value: "77334084BT".
25 Sep 2026, Unit2 service-branch sweep: the stored Secondary Unit "Air Force" was CLEARED as a duplicate. It was not a sub-unit, it was a service-branch word repeating what the Branch column already says. Secondary Unit is for sub-units -- a company, a squadron, a commando -- and this record's branch of service is unchanged at "Air Force".