Southern Pacific GS-3 class
class of 14 American 4-8-4 locomotives
The GS-3 was a class of streamlined 4-8-4 "Northern" type steam locomotive operated by the Southern Pacific Railroad (SP) from 1938 to 1957. A total of fourteen were built by the Lima Locomotive Works, numbered 4416 through 4429. GS stands for "Golden State" or "General Service."
History
The popularity of the Southern Pacific Coast Daylight trains was overwhelming and prompted the Southern Pacific to initiate plans to introduce several new streamlined, lightweight trains: the Noon Daylight, the San Joaquin Daylight, and the Lark. A second order for 14 additional Daylight engines was placed with Lima Locomotive Works. All engines were set up upon delivery at El Paso, Texas. Number 4416 was the first and was set up on November 3, 1937. Number 4429 was last and set up on December 30, 1937. The GS-3 had an appearance similar to the GS-2. They featured a silver smokebox with a cone-shaped single headlight casing, skyline casing on the top of the boiler, skirting on the sides, an air horn to supplement the whistle, and teardrop classification lights. The only significant difference in appearance was the increase in driver size.
Begin with the source’s own compact description: “Southern Pacific GS-3 class” is class of 14 American 4-8-4 locomotives. The dossier treats that line as a proposition to test through Southern, Pacific and GS-3, not as a finished interpretation.
Why this record matters
The phrase “class of 14 American 4-8-4 locomotives” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated May 4, 2026. The linked authority identifier is Q7570305. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1938, 1957 and 1937.
A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Southern Pacific GS-3 class”, its source revision and the description used here.
- Expand the search: follow Southern Pacific GS-3 class primary sources, Southern Pacific GS-3 class archive and Southern research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Southern Pacific GS-3 class”?
- Which cited source is closest to the event, object or claim?
- What terminology or title could unlock a more precise catalogue search?
Search terms from this dossier
This entry incorporates text from “Southern Pacific GS-3 class” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.