(Shelf 11 T 2 box B   )Vintage Keuffel & Esser (K&E) Polyphase Slide Rule Manual No. N4053. This classic engineering reference was produced for use with K&E Polyphase slide rules and provides instruction on slide rule operation, calculations, and practical applications.

The manual shows age-related wear consistent with its vintage nature, including possible edge wear, toning, and handling marks. It remains an excellent piece for collectors of scientific instruments, engineering memorabilia, and slide rule enthusiasts.

Please review all photos for condition details, publication information, and completeness. A great addition to any vintage engineering, mathematics, or scientific instrument collection. selling is used vintage condition some ware tried to show. Been in storage a long time.  has some damage in tried to show . For the age not to bad

I don't inflate shipping, but I do add weight for packaging and shipping safely. Thanks

please ask if more information or pictures are needed

thanks, Bryan 12,25 # 111

A great piece!

We aim for High Quality*

We are also aware that the shipping cost is slightly high.We are estimating the weight.If shipping, however, does cost less.We will gladly  reimburse you the difference: )

If you have any problems with our items please contact us before giving us a negative. We will be gracious enough to deal with the entire situation accordingly. We are an honest establishment. We will be honest with you. We will not be difficult if you treat us fairly, just, and be honest; then we will definitely do the same with you. Thank you for your assistance. Good luck bidding. - 1823bryoy