Vintage MASCO models JM-5 (master station) and JR (sub station) 3 tube AC-DC intercom system. Original old Sams Photofact manual includes schematics, layouts, voltage & resistance readings, parts list. 4 pages. Dated 1948. Mark Simpson Mfg. Company, Inc. of Long Island City, NY.
masco model jm-5 3 tube ac-dc intercom system sams photofact manual
- Product Code: 0004218
- Length: 11 inches
- Width: 8 inches
- Pages: 4
- Views: 32
- Availability: In Stock
- $9.99
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