Rare Polyphase 4053 K&e Slide Rule
$325.00
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Description
Cool very early Kueffel & Esser polyphase slide rule, pat June 5, 1900. 4053 with no dash Owner has scratched initials & date inside: 1909. There is staining on it, but it is a really cook slide rule with box, with no top. On the end, the number 20 is stamped twice. It has Keuffel & Esser stamped on the slide. We can't find another like it. There were two versions of the 4053 with no dash. The models that came after are more common. More info on this example: https://www.mccoys-kecatalogs.com/KECollection/4053/ke4053_1.htm Rare Polyphase 4053 K&e Slide Rule
