Vintage OPERADIO model 4M25C 3 tube Intercommunications system. Original old Sams Photofact manual includes schematic, layouts, voltage test charts, repair parts list. 4 pages. Dated 1950. Operadio Manufacturing Company of St. Charles, IL. Intercom system.
operadio model 4m25c intercommunications system sams photofact manual
- Product Code: 0209911
- Length: 11 inches
- Width: 8 inches
- Pages: 4
- Views: 58
- Availability: In Stock
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