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<p>[QUOTE=&quot;Marote, post: 9742014, member: 84568&quot;]On Ebay there&#039;s a PT-81, with the info that it&#039;s from the 50s, but no idea if that&#039;s correct. The instructions for that phone are for the PT-81, PT-81s, PT-82 and PT-82s, so possibly the number is really just the model no. And PT seems to be &#039;Portable Telephone&#039;</p><p><br /></p><p>I concur</p><p>On X there&#039;s this PT-72,</p><p>[ATTACH=full]476705[/ATTACH] with this text (according to Google Translate):</p><p>&quot;Mobile phone PT-72</p><p>Unlike today&#039;s mobile phones, they were created at the time to serve as a means of communication at construction sites, etc., and for power/railway-related maintenance communications. This is a telephone that is carried around the premises and used by connecting to an installed line.&quot;</p><p><br /></p><p>And of course there&#039;s a year mentioned on the signs of the other 3 phones, and not on the PT sign <img src="styles/default/xenforo/smilies/rolleyes.png" class="mceSmilie" alt=":rolleyes:" unselectable="on" />[/QUOTE]</p><p><br /></p>

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