National Telegraphic Union · New York : N.T.U. · leaf 285
OTHER SUPPLIES,RESPECTFULLY ANNOUNCEthat they have increased their facilities for the Prompt Execu-tion of all orders with which they may be entrusted. They areprepared to Contract for the Construction and Equipment of NEW LINES OP TELEGRAPH,for the Re-Construction or Repair of EXISTING LINES,for… … PATENT ANTI-TRUNNION KEY, WITH ECCBNIKIC CIRCUIT CLOSEK. They above KEY has recently been patented, and is believed tobe the best form of Key yet presented for adoption and use byTelegraph Companies or Operators.
Telegraph
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![An illustration from The Telegrapher [microform], 1864, leaf 285](https://img.insideoutlibrary.com/img/1024/ia-telegrapher05nati-285-183.webp)
