F. Weber 28993 Compensating Polar Planimeter

A vintage precision measuring instrument, the F. Weber 28993 Compensating Polar Planimeter measures planar areas by tracing figures on maps or drawings and comes with a hard-shell case. This compensating polar planimeter is identified by model No. 28993 and features a compensating mechanism designed to maintain accuracy as the tracing point follows curved boundaries. The hard-shell case protects the instrument during transport and storage, making it a practical option for collectors, educators, or professionals who work with historical measurement tools. The model designation 28993 helps distinguish this unit within Weber’s catalog and supports documentation, cataloging, or resale provenance. As a piece with historical value, it reflects the era's approach to manual area measurement and can be used for display, demonstration, or study in contexts where authentic vintage instrumentation is desired.