Marine Corps · SSN history

160 Physics Laboratory Assistant

Appendix B identifies SSN 160 as Physics Laboratory Assistant in the September 1942 AR 615-26 and supplements column, and suggests SSN 411 as a possible conversion. That suggestion required review of the individual's qualifications against the job specifications, not automatic reassignment to 411.

Codes named in this history

Codes without a directory match

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

Documented history

Physics Laboratory Assistant

June 1945 is the manual's publication date. No effective date is given for a change to SSN 160.

  • The June 1945 Present Title column is blank; the entry does not establish a specific cancellation, rename, or completed replacement.
Source extraction notes

Predecessor title from the AR 615-26 column: Physics Laboratory Assistant. Suggested conversions/remarks: 411. 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.