JB - Junction Box

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  • JB-1 ?
  • JB-2 ?
  • JB-3, cast iron box 11" x 18" 4"
  • JB-4, composition box, 8" x 4" x 3" , 12 binding posts, P/O EE-36
  • JB-5, cast iron box, 15" x 10" x 6"
  • JB-6, cast iron box, 4" x 4" 3"

(NOTE- 1920 storage catalogue ends here)