c.1950s Keuffel & Esser (K&E) Proportional Divider in Original Velvet Case – German Drafting Tool
Viridian Eclection
The Piece
A Keuffel & Esser proportional divider, precision machined in steel and housed in its original fitted case with a deep blue velvet lining.
The instrument is built around an adjustable central pivot carried on a finely calibrated slide, with engraved scales for both circles and linear measurements. Setting the slide fixes the ratio between the two pairs of points, so a dimension taken at one end is reproduced enlarged or reduced at the other.
The mechanical action is smooth and deliberate. The needle points are sharp and the balance of the piece is even in the hand. Surfaces carry subtle wear consistent with real use, and the engraved scales remain legible.
Closed, the case is black. Open, the blue velvet bed gives the instrument a presentation quality.
History & Provenance
The instrument is marked Keuffel & Esser Co. and Germany, the firm's name paired with the country of manufacture.
Keuffel & Esser was founded in 1867 and became one of the most respected names in drafting and engineering instruments, supplying architects, engineers and surveyors for decades.
Dating is arrived at by pattern rather than by a date mark. The form of the instrument, the case and the style of the engraving place it around the 1950s, within the mid twentieth century range of roughly the 1940s to the 1960s in which this style was current.
This was the period when drafting tools were engineered with the same seriousness as scientific equipment, and the tolerance of the slide and the points reflects that.
Product Details
| Maker | Keuffel & Esser Co. (K&E) |
| Origin | Germany |
| Era | c. 1950s, within a mid twentieth century range of roughly the 1940s to the 1960s for this style |
| Form | Proportional divider |
| Materials | Steel with engraved measurement scales |
| Marks | Keuffel & Esser Co. / Germany |
| Function | Enlarging or reducing drawings proportionally |
| Design Features | Adjustable central pivot, engraved ratio scales, dual point precision tips |
| Case | Original black case with blue velvet interior |
| Dimensions | Approximately 8 to 10 inches, the usual range for this model. Exact measurement to be confirmed |
| Condition | Vintage condition with light surface wear. Case intact with minor signs of age |
Why It Belongs in Your Home
Antique drafting instruments sit well in a study, a library or an office because they read as object and as idea at once. This one is small enough for a desk and specific enough to hold attention.
The velvet lined case means it can be shown open on a shelf with the divider seated in its bed, or closed as a discreet black box.
The appeal for a collector or a designer is the refined industrial aesthetic: clean lines, balanced weight, and a surface that shows the tool was used. It works in a grouping of scientific instruments, on a console with books and brass, or alone as a quiet mark of precision.
Every piece is packed with professional-grade materials: multiple foam layers, double-boxing, directional and fragile handling labels. For large furniture we use custom timber crating. We photograph packing before dispatch and can provide images on request.
White-glove delivery is complimentary within 100 miles of Reno, NV. National shipping quotes provided at checkout. All shipments are photographed and documented. Damage claims must be filed with the carrier; we provide all documentation needed to support your claim.
Local pickup is available at Viridian HQ (Reno, NV) with 2–4 days notice. Contact us to arrange. Private viewings also available.
All antique and vintage items are sold as described and all sales are final. Each listing includes detailed condition notes and photographs so you can make a fully informed decision. We encourage buyers to ask questions — about condition, dimensions, finish, provenance — before purchasing.
Antiques are irreplaceable and one-of-a-kind. Carrier handling is outside our control once a piece has left our facility, and major carriers including FedEx do not insure antiques. We do everything within our power to ensure safe transit, but cannot accept liability for carrier damage. If damage occurs in transit, we will provide full documentation to support your carrier claim.
Have a question? — we're happy to provide additional photos, condition detail, or discuss the piece directly.
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