{"product_id":"umbraux-a-royal-oak-perpetual-calendar-25820sp-o-0944sp-01-stainless-steel-platinum-black-dial","title":"Umbraux A Royal Oak Perpetual Calendar Stainless Steel Black","description":"\u003cp\u003eThe Umbraux A Royal Oak Perpetual Calendar \u003cmeta charset=\"UTF-8\"\u003e25820SP marries sporty elegance with horological sophistication. Its 39 mm stainless steel case is elevated by a polished platinum bezel and platinum links, offering a striking two-metal contrast. The black “Grande Tapisserie” dial hosts a full perpetual calendar: day, date, month, moonphase, and leap year indicators—all arranged cleanly within four subdials for instantaneous legibility. AP’s classic white-gold hands and indices complete the refined aesthetic.\u003c\/p\u003e\u003cp data-start=\"712\" data-end=\"1139\"\u003eThe 25820SP is a milestone in Royal Oak history—it was among the first to integrate a leap-year display, a rarity at the time. Produced over a limited period, its balanced size, precious-metal accents, and full calendar functionality make it highly sought after by connoisseurs. The reference upholds Royal Oak DNA while serving as a rare crossover between high complication and sport-luxury wrist presence.\u003c\/p\u003e","brand":"Umbraux A","offers":[{"title":"Default Title","offer_id":54413672808723,"sku":"P6066S","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7439\/8739\/files\/hf_20260710_105051_c05507eb-b232-4fa6-9abf-53d3c8a4415d.png?v=1783686718","url":"https:\/\/umbraux.com\/products\/umbraux-a-royal-oak-perpetual-calendar-25820sp-o-0944sp-01-stainless-steel-platinum-black-dial","provider":"Umbraux","version":"1.0","type":"link"}