When I stopped in Hong Kong on the way to Nam, I shopped at the China Fleet Club and pick up a Seiko, for if I remember right 38 bucks..It was one of those self winders, I had the crystal replaced several times over the years. Every time I took it in to have it done I was asked where I purchased it...And I told them and asked why? I was informed that the shield with the number 5 was not sold in the USA..The face backing has deteriorated over the years and my son had it restored..Just thought you might like to know.