Marine Corps · SSN history

300 Tool Designer

Appendix B lists SSN 300 as Tool Designer under the September 1942 regulation and its supplements and the June 1944 tentative manual, with SSN 241 suggested as a replacement. This was not an automatic conversion: each affected Marine's Qualification Card had to be reviewed against the manual's job specifications.

Codes named in this history

Codes without a directory match

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

Documented history

Tool Designer

No effective date is given for this suggested change. June 1945 is the manual's publication date, not an established conversion or end date for SSN 300.

  • The June 1945 Present Title column is blank for SSN 300; the entry does not establish a same-code rename or a fixed replacement.
Source extraction notes

Predecessor title from the June 1944 tentative-manual column: Tool Designer. Suggested conversions/remarks: 241. 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.