Sea-Gull of China has a long history and is a huge manufacturer of mechanical movements. Over the years, I’ve bought several Sea-Gull watches and they’ve all exceeded expectations. Reliable and priced at a fraction of Swiss brands. But in terms of marketing and image, Sea-Gull lags way behind. This particular tourbillon model is steel, 41mm, manual wind. Used occasionally, I found accuracy to be acceptable, consistently 10 to 15 seconds a day