Measures: 5.5" x 3.5"

Real Photo Postcard (RPPC) showing U.S.N.P. No. 2 Autoclave & Process Steam Plant. The image captures industrial architecture including elevated storage tanks, complex piping, a hopper/conveyor structure, and railway tracks running in the foreground — strong occupational and industrial Americana content.

• Type: Real Photo Postcard (RPPC) — continuous photographic tone, no halftone dot pattern
• Stamp Box: AZO, four triangles pointing UP — dated 1904–1918
• Back: Divided Back era
• Subject: U.S.N.P. No. 2 Autoclave & Process Steam Plant (caption visible lower right of image)
• Condition: VG+ — please review all photos for full condition assessment
• Size: Standard 3.5" × 5.5"

A compelling industrial-history RPPC with crossover appeal to railroad, manufacturing, occupational, and early 20th-century Americana collectors. Both front and back photographed; please review all images before purchasing.

Combined shipping available — additional cards ship at reduced cost. Securely packaged in a rigid toploader for safe delivery.