This photo taken on March 24, 2025 shows the first domestic watch displayed at a museum of the watch manufacturer SEA-GULL in north China's Tianjin. (Xinhua/Zhao Zishuo)TIANJIN, March 23 (Xinhua) -- SEA-GULL, a watch manufacturer based in north China's Tianjin, celebrated the 70th anniversary of New China's first domestic watch with various activities on Monday.In 1955, a watch was successfully developed in Tianjin, marking SEA-GULL as the birthplace of the nation's pioneering timepiece. After seven decades of research and development efforts, the company has mastered advanced watchmaking technologies with independent intellectual property rights.A staff member poses for photos at the company campus of the watch manufacturer SEA-GULL in north China's Tianjin, March 24, 2025. (Xinhua/Zhao Zishuo)A staff member looks at a watch movement model at a museum of the watch manufacturer SEA-GULL in north China's Tianjin, March 24, 2025. (Xinhua/Zhao Zishuo)A staff member tests a watch at a workshop of the watch manufacturer SEA-GULL in north China's Tianjin, March 24, 2025. (Xinhua/Zhao Zishuo)Staff members assemble watches at a workshop of the watch manufacturer SEA-GULL in north China's Tianjin, March 24, 2025. (Xinhua/Zhao Zishuo)