ETA SA RESOURCES-F-8171

The RESOURCES-F-8171 is an automatic movement manufactured by ETA SA in China. It features a regulateur layout with a pointer-style 24-hour indicator and a disc-type day/night display. The movement includes KIF shock protection and a bidirectional perpetual rotor. Originally launched in 2007, it incorporates an open balance wheel—a feature PTS Resources categorized as "Imitate Tourbillon." The caliber appears in watches such as the Stauer Regulator Series 5.