This vintage K & E Slide Rule 4081-3 Duplex Decitrig is a rare find for collectors of scientific instruments. Manufactured in the United States in the 1950s, this slide rule is a complete original and is in excellent working condition. Its unique design makes it a must-have for anyone interested in engineering or slide rules.

The slide rule is in its original box and slide case, as well as in its original sheathing which is in great condition and not written on the leather inside like most are.

This also comes with the original manual and care pamphlet - original plastic the slide ruler was in and a receipt from Long Beach State where this was purchased.

All around this is an amazing collector item.

This is a one of a kind find having everything that this comes with and in such great condition. Especially the sheathing which was not written in which many students did as they needed to identify which one was theirs.

This item will ship free to you with tracking provided.