Marine Corps · SSN history

412 Engine Specialist (Machinist Automobile)

Appendix B identifies SSN 412 as “Engine Specialist (Machinist Automobile)” under September 1942 AR 615-26 and its supplements, and suggests SSNs 014 and 114 as alternatives. These were not automatic conversions: selecting a replacement required reviewing the individual's Qualification Card against the manual's job specifications.

Codes named in this history

Codes without a directory match

  • 014 stated by the source. No directory or archive record matches.
  • 114 stated by the source. No directory or archive record matches.

Documented history

Engine Specialist (Machinist Automobile)

June 1945 is the manual's publication date. The entry gives no effective date for a conversion or for the end of SSN 412.

  • The June 1945 Present Title column is blank; the entry does not establish a fixed split into 014 and 114.
Source extraction notes

Predecessor title from the AR 615-26 column: Engine Specialist (Machinist Automobile). Suggested conversions/remarks: 014, 114. The table gives no row-level effective date. June 1945 is the manual publication date, not an effective conversion date.

Source documents (1)

Reviewed September 24, 2026 against references 3 and 4.

Historical information is drawn from the sources linked above. Classification dates are not personal service dates. Spot an error? Let us know.