There are dive watches.....and there are Dive watches! - Universal Geneve Polerouter Sub, Ref. 869120 - cal. 1-69 on original UG double grain Gay Freres bracelet.
My experience in China was the same. I could not tell if the Seagulls I was finding were real or fake. I actually picked this up from the Seagull Canada website (seagullcanada.com) a few weeks ago. This was my first time ordering from them, and I was somewhat skeptical that it was going to both arrive and be real, but I took a flyer. I was really pleasantly surprised all around. I ordered it Sunday, November 8th and if was delivered to me in New York on Tuesday, November 24th. To my eyes, I am reasonably sure it is authentic. It's details all seem to match what I can find on the Chinese Seagull websites (seagullwatch.com and sea-gullmall.com). It also came with all of the appropriate paper work and tags. If you are considering ordering from them, all the prices (as least from a U.S. IP address) were in USD, the shipping was free, and they seem to also give you an additional $25 off in your cart automatically. I would not hesitate to deal from them again. Hope this is helpful.