Vintage Keuffel & Esser K+E Slide Rule 4053-3 Polyphase With Box Sheath & Manual

Description

This listing is for a vintage K + E Polyphase 4053-3 slide rule as shown.  This slide rule is in it's original leather sheath and box, both of which show wear.  The instructions manual and a small pamphlet on how to care for the slide rule is included.  The slide rule 'slides' as it should but does show wear from use and age.  Zoom in on the pictures for more detail.  This slide rule is coming from a smoke- and pet-free home.
This slide rule will be sent to you via USPS or UPS (no P.O. Boxes, please) using the least expensive service for free.  If you have recently checked ever-increasing shipping rates, you will know there is significant value in free shipping.  I ship all items the next business day after your payment clears.  Please note that I only ship to the 48 contiguous states.
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