== APS Variable Auto Teleplus 2x/3x - M42

Unusual vintage APS Variable Auto Teleplus system for M42 screw mount. Modular two-part construction allows the converter to be configured for either 2x or 3x magnification.

The lower section is marked "Variable Auto Tube", while the optical converter provides selectable 2x and 3x configurations. A versatile and interesting accessory for vintage M42 lenses.