Used to check that tournament Croquet Balls meet the strict Croquet England and International size standards. A set of three gauges with maximal, nominal and minimal ball diameter holes.
Made of clear acrylic
3 x accurate ball gauges with hole diameters 3 21/32”, 3 5/8”, 3 19/32” as labelled.
The gauges are securely fastened but free to pivot independently.