Seagull's 1963 Air Force homage was a limited production model which is now discontinued. They probably lost money on it. If you visit China, you may be able to buy old stock directly from Seagull.
There are people in China, some of them former Seagull employees, who assemble this watch from parts bought from Seagull and Seagull's subcontractors. Everyone agrees that their quality control is not as good as Seagull's, so it is important to buy from a dealer with a long record of supporting the product by adjustment or replacement. There are two long threads about this at Watchuseek:
http://forums.watchuseek.com/f72/seagull-1963-reissue-available-seagull-hk-directly-420653.html
http://forums.watchuseek.com/f72/1963-chinese-air-force-style-watches-thomas-others-821627.html
This is not an easy watch to buy. It is based on a cheap, 50 year-old military watch with no water resistance and no lume, and is not a practical purchase by anyone's definition of practical. It is not a collectors' piece or an investment. So why would anyone want it?
It is a little piece of history with a Venus 175 column wheel chronograph movement. The Venus 175 was produced at the former Fabrique d'Ebauches Venus S.A. in Moutier between 1940 and the mid 60's. It was a hand-wound column wheel movement used extensively in chronograph watches of the 1940s and 1950s, especially by Breitling. In 1963, Venus decided to switch production to an automatic movement and tried to finance retooling by selling the 175 to the Soviet Union. The Soviets weren't interested but China was. China had severed diplomatic and commercial relations with the USSR in 1962, and since they could no longer buy chronograph movements from Strela, they bought Venus's tooling to make the 175 themselves.