Vintage watchmaker expanding collet mandrel and arbor tool set for holding small round parts during watch, clock, jewelry, or precision repair work.

The larger tool features an expanding segmented collet operated by the threaded T-handle. The additional tapered arbor/mandrel is included as shown.

Useful for gripping small circular components such as bezels, bushings, rings, wheels, and similar parts for fitting, polishing, filing, or repair.

Maker is unknown.

Please review photos closely for condition and exact contents.