530X0 Metal Worker

Metal Worker · Converted to 531X4, effective 1976

Explicit created-from lineage. Legacy separately records 535X0 -> 531X4, creating a conflicting-origin/reused-code collision for parent review. Verified source wording: “Since its creation as a separate career ladder in 1976 with the establishment of AFSC 531X4 from AFSC 530X0, Metal Worker, the 427X1 specialty has had a fairly stable history.”