Like New

lightly used with minor flaws, to be included in the description

Good

fully preloved, with noticeable flaws, to be included in the description

Fair

Antique collectible .

Antique mechanical polar planimeter

Vintage Mechanical Planimeter – Precision Engineering Measuring Instrument (Complete in Case)

Up for sale is a classic mechanical planimeter, a precision instrument historically used by engineers, architects, and surveyors to measure the area of irregular shapes on maps and technical drawings.

This unit comes complete in its original fitted case with a clean velvet interior and includes the original reference/calibration charts inside the lid. The instrument features an adjustable tracing arm and mechanical measuring wheel with a dial for accurate readings.
These instruments are not only functional but also highly collectible, making them ideal for:
Engineering or drafting enthusiasts
Collectors of scientific instruments
Decorative display in offices or studios
Practical use for manual measurement work
Condition: Good vintage condition with light signs of age. Case and interior are well preserved. 

A great piece of engineering history and a conversation starter.

This item is an antique mechanical polar planimeter, likely made by Allbrit or a similar manufacturer like G. Coradi. These precision tools were historically used by engineers and surveyors to measure the area of irregular shapes on maps, blueprints, or technical drawings. 

Physical Description:

This object is an Amsler-type polar Planimeter in a blue velvet lined leatherette case. A supporting arm is anchored to the work table with a short cylinder having a sharp point like a compass needle. It is linked to the tracing arm with a ball headed pin that forms an elbow hinge. The tracing arm has at one end a carriage consisting in a pair of supports that hold between them the accumulator wheel and vernier. This carriage may be positioned along the tracing arm for the scale of the curve being measured. The accumulator wheel is the moving part that touches the table. At the tracing end the arm has a magnifying glass cursor. As the pointer is moved around the perimeter of the curve whose area is being measured the steel rim rolls forwards or backwards and skids sideways. The scale is on the wheel itself and indicates how far the wheel has turned. The final dial reading represents the sum of all the rim's rolling motions. This number is proportional to the area of the region.


***NB: Glass Eye piece missing but not necessary for usage, this has been factored into the price, this collectible sells for around R3000 to R5000 upward.

Incredible condition for it's age.

My price is a steal.


Antique 
Collectible 
Vintage 
Engineering 
Antique collectible for engineering 
Architecture antique 
Vintage collectible

This item is already sold

R 350

Lit & Legit