Machinist · Converted to 427X0, effective April 1, 1977
The surrounding paragraph explicitly describes Machinists; month precision preserved. Verified source wording: “In April 1977, the AFSC was changed from 531X0 to its present AFSC, 427X0.”
Sources
- Machinist Specialty AFSCs 42730, 42750, 42770, and 42799. (Internet Archive full-text OCR around char offset 8,025; governing lineage context verified)