{"nrhp_refnum":"79002273","name":"Passenger Locomotive No. 1737","other_names":[],"category":"structure","location":{"address":"E of Strasburg","address_restricted":false,"city":"Strasburg","county":"Lancaster County","state":"PA","lat":39.982416870000066,"lon":-76.16077163499995,"geom_source":"nps_gis"},"listed_date":"1979-12-17","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Commerce","Transportation","Invention"],"significance_levels":["national"],"summary":{"what_it_is":"Passenger Locomotive No. 1737 is a Pennsylvania Railroad Class K-4 Pacific-type steam locomotive, built in 1918 according to the form, and located in Strasburg, Lancaster County, Pennsylvania. It is listed as part of the Pennsylvania Railroad Rolling Stock thematic resource.","why_significant":"The form describes the Class K4 as the principal passenger hauler of the Pennsylvania Railroad from 1914 into the early 1950s, with 425 built, most at the Juniata Shops. It calls the K4 America's most famous Pacific type and perhaps the most successful passenger engine the railroad built. The original #1737 deteriorated beyond preservation, and the surviving display engine is a stand-in.","narrative":"Built at the Pennsylvania Railroad's Juniata Shops, Locomotive #1737 was the first of the Class K4 Pacific-type passenger engines, a 4-6-2 design with 27-inch by 28-inch cylinders and 80-inch drivers. The K4 became the railroad's principal passenger locomotive from 1914 into the early 1950s, and 425 were built, most at Juniata. Its 205-pound boiler pressure, 1,215 square feet of superheating surface and 44,460 pounds of tractive force made it a strong and reliable hauler for long-distance trains. The form regards the K4 as America's most famous Pacific type and perhaps the most successful passenger engine built by the railroad. The original #1737 deteriorated beyond preservation, so Engine #3750, fitted with the original tender and number plates, was selected as a stand-in. The listing rests on the class's historic importance to Pennsylvania Railroad passenger service.","period_of_significance":null,"architect_builder":"Juniata Shops (Pennsylvania Railroad)","architectural_style":null,"criteria":[],"status_note":"The original #1737 deteriorated past preservation; Engine #3750 was selected as a stand-in and fitted with the original tender and number plates.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:33.130804-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/79002273.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/79002273/f4e7e3ba95-800.webp","url_1600":"https://nationalhistoricalregister.com/media/79002273/f4e7e3ba95-1600.webp","licence":"CC BY-SA 3.0","author":"Ad Meskens","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:PRR_3750_4.JPG\" rel=\"noopener\">Ad Meskens</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\" rel=\"license noopener\">CC BY-SA 3.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:PRR_3750_4.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71993181","wikipedia":"https://en.wikipedia.org/wiki/Pennsylvania_Railroad_3750","wikidata":"https://www.wikidata.org/wiki/Q7120446"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/lancaster-county/passenger-locomotive-no-1737-79002273/"}