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<p>[QUOTE=&quot;2manybooks, post: 13206166, member: 8267&quot;]Well, that is a very useful bit of information that you should have revealed in the beginning.</p><p><br /></p><p>from an AI query -</p><p><br /></p><p>&quot;On your vintage heavy-duty mechanical journal jack (specifically a <a href="https://www.google.com/search?ibp=oshop&amp;prds=pvt:hg,pvo:29,imageDocid:17687083158948285267,headlineOfferDocid:3599998895883495720,productDocid:3599998895883495720&amp;q=product&amp;sa=X&amp;ved=2ahUKEwja39aS7K-XAxV-nSsGHVwpFG4Qxa4PeggIAggBCC0QAQ" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.google.com/search?ibp=oshop&amp;prds=pvt:hg,pvo:29,imageDocid:17687083158948285267,headlineOfferDocid:3599998895883495720,productDocid:3599998895883495720&amp;q=product&amp;sa=X&amp;ved=2ahUKEwja39aS7K-XAxV-nSsGHVwpFG4Qxa4PeggIAggBCC0QAQ" rel="nofollow">Duff-Norton</a> or <a href="https://www.google.com/search?ibp=oshop&amp;prds=pvt:hg,pvo:29,imageDocid:15548258144449289591,headlineOfferDocid:11726690821265056354,productDocid:11726690821265056354&amp;q=product&amp;sa=X&amp;ved=2ahUKEwja39aS7K-XAxV-nSsGHVwpFG4Qxa4PeggIAggBCC0QAg" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.google.com/search?ibp=oshop&amp;prds=pvt:hg,pvo:29,imageDocid:15548258144449289591,headlineOfferDocid:11726690821265056354,productDocid:11726690821265056354&amp;q=product&amp;sa=X&amp;ved=2ahUKEwja39aS7K-XAxV-nSsGHVwpFG4Qxa4PeggIAggBCC0QAg" rel="nofollow">Simplex</a> style heavy ratchet screw jack), the stamp &quot;ARR&quot; stands for the Alaska Railroad. [<a href="https://www.trainz.com/collections/modern-era-vintage-model-trains?page=242" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.trainz.com/collections/modern-era-vintage-model-trains?page=242" rel="nofollow">1</a>, <a href="https://en.wikipedia.org/wiki/Alaska_Railroad" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Alaska_Railroad" rel="nofollow">2</a>]</p><p>Why it&#039;s marked &quot;ARR&quot;</p><ul> <li>Ownership Stamp: Major commercial railroads custom-ordered these massive mechanical jacks from manufacturers like Duff-Norton Mfg. Co. to use for heavy track maintenance, locomotive repairs, or stabilizing railcars. To prevent theft and keep inventory straight among different rail lines, the foundry cast or hot-stamped the railroad&#039;s reporting marks directly into the steel housing.</li> <li>The Reporting Mark: In the North American railroad system, ARR is the official assigned reporting mark unique to the Alaska Railroad.</li> <li><a href="https://en.wikipedia.org/wiki/Alaska_Railroad" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Alaska_Railroad" rel="nofollow">https://en.wikipedia.org/wiki/Alaska_Railroad</a>&quot;</li> </ul><p>[/QUOTE]</p><p><br /></p>

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