Purveyors and Dealers of Americana / Patented & Mechanical Antiques
Mechanical Americana & Misc
Office & Scientific
Please Contact me with any early and unusual slide rule that you have for sale.
www.Antiqbuyer.com is our informational and past sales results website.
There are links on the left to other informational pages, and on the right,
links to past sales results for antiques & Collectibles that we have sold.
Below are some pictures of the
types of scientific antiques and vintage calculation devices and slide
rules that we deal in and are seeking, along with some basic information
to help you determine what you have. I am an
active antique dealer interested in antique and
collectible slide rules and other calculation devices that date from the
early 20th century and before. This page is a basic
primer describing the different and various types of scientific and
calculation devices we buy, sell, deal in, and can help you sell.
A Basic K & E Slide Rule Cursor Lesson or Beginning Primer for the Curious
The next three pictures give views of different early cursors (the sliding window portion)
employed by Keuffel & Esser or K & E and represent the transition
or changes that slide rule cursors have gone through. This is by no means
the full story, and there are variations and other designs by other
companies that are not covered here.
interested in any slide rule with one of these early cursors pictured, or slide rules with any other
unusual cursors that some other companies used. Some of these had small decimal keepers
or counters on
them, or moveable arrows, or in one case a small
abacus to help you along with your calculations and in keeping track of where the
decimal point belonged. Some also had magnifiers built into the cursor.
K & E offered clip on magnifiers.
The first picture is of a relatively common but very collectable
put out by K & E or Keuffel & Esser. It
is known as
the Deci-Lon and was one of the last sliderules K & E
made or offered.
It is all plastic and was produced for a number of years, with
the last models being designated by the model number 68-1100.
Before the Internet and the beginning of their "known" or
documented popularity this rule could be had routinely for $20 or less and
was routinely passed over by collectors and those in the
"know" who were looking for earlier and rarer examples of slide rules.
Today this rule routinely brings $100 or so, not because they
are scarce, but rather because they are popular. The 5" version sells for
even more for the same reasons. The collecting frenzy over them and
the resulting prices they bring is largely driven by
the same impulse that has created a desire for collectibles like GI Joes
and Barbie dolls rather than anything resembling scarcity or the historical significance
associated with them.
me with any early and
unusual slide rule that you have. I can help you with it.
have. On our sister site
I have a good sampling of slide rules available for sale.
Please visit that site if you are looking to buy slide
To see examples of similar antiques that
we currently have for sale please go to our sister site at
visit the numerous sale pages you will find there.