Vintage Gruen Precision Repair: 25 Jewel Calibre 710 RSS
This Gruen Precision Caliber 710 RSS features a well-preserved manual-wind movement from the 1950s, known for its compact design and reliable performance. The movement includes RSS (Rutschhemmende Stoßsicherung) shock protection, enhancing its durability against everyday wear. During inspection, the movement was found to be in very good condition, showing minimal wear and requiring only routine cleaning, lubrication, and adjustment.
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Overview of the Gruen Precision watch
The Gruen Precision 710 RSS is a fine example of mid-20th century American-Swiss watchmaking, produced during the 1950s when Gruen was known for blending elegant design with quality mechanical movements. The “710” refers to the movement caliber—part of Gruen’s manual-wind 700 series, which featured compact, reliable designs—while “RSS” denotes “Rutschhemmende Stoßsicherung”, a German term indicating a form of shock protection built into the movement. Often housed in gold-filled or stainless steel cases, these watches were marketed as both practical and stylish, appealing to professionals who valued precision and durability. Today, the 710 RSS is appreciated by collectors for its understated style, reliable performance.