This is a James G. Biddle Jagabi Speed Indicator tachometer used for measuring rotational or surface speeds.

Function: It is a handheld device used to measure revolutions per minute (RPM) or linear surface speed.

Mechanism: The tool combines a stopwatch mechanism to measure speed over a set amount of time.

Usage: To use it, a tip is pressed against a rotating part to calculate the rotational speed.

Accessories: The kit includes a circumference wheel for measuring linear travel, often alongside various tip attachments.

The set includes the original dial indicator and 3 attachment pieces, housed in a protective case made in Switzerland, known for its craftsmanship and reliability.

• Brand: James G. Biddle Company

• Location: Plymouth Meeting, PA (USA)

• Condition: Pre-owned but in good working condition. Some wear on the case due to age, as seen in the photos. The dial indicator appears to function correctly and the case latches securely.

• Case: Original, made in Switzerland

• Uses: Ideal for machinists, engineers, or collectors of vintage tools

• Measurement Type: Precision depth, flatness, and alignment measurement tool

Please review all photos to see the exact condition of the items. The dial face is clear and legible, and the tool shows little to no signs of significant wear. Perfect for someone looking to restore or enhance their tool collection with a reliable, vintage piece.