Abstract: The use-registering reel for flexible tape has a pair of lateral disk-like members in spaced parallel relationship united to an axially centered core structure. The core structure includes an axial hub and a cylindrical tape-support member at its radially outer perimeter. Between the hub and tape-support member, within a radial segment of the core structure, is a walled housing having a transparent window. The housing is united to the core structure and undergoes orbital movement about the hub axis during rotation of the reel. A counter assembly is mounted in tamper-resistant condition in the housing for orbital movement with it. The counter assembly includes an actuatable indicating means for registering revolutions of the reel, an action means for actuating the indicating means responsively to rotation of said reel, and selective means responsive solely to the direction of rotation of said reel.