Case material: NA; Charge: Automatic; Conditions: New Presentation condition : With dealer guarantee ; Price on request Gmtbroker Reference: w21610 Orbita Watch Winders & Cases w21610 Complete Details: Six winders enclosed in modern black powder coated steel. Each head is individually powered with its own on/off switch. Features the unique Rotorwind system Choose either every 10 or 15 minute rotations Powered with 4 Lithium D Cell batteries   This watch is also known as w21610