Marine Corps · SSN history

644 Chief Field Lineman

Appendix B identifies SSN 644 as Chief Field Lineman under AR 615-26 (September 1942 and supplements) and suggests SSN 641 as a possible conversion. This was not an automatic replacement: each affected Marine’s qualifications had to be reviewed against the job specifications.

Codes named in this history

Codes without a directory match

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

Documented history

Chief Field Lineman

June 1945 is the manual’s publication date. No effective date for a change from SSN 644 is given.

  • The June 1945 Present Title column is blank; the entry does not establish a fixed successor or explicitly state a cancellation.
Source extraction notes

Predecessor title from the AR 615-26 column: Chief Field Lineman. Suggested conversions/remarks: 641. 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.