[daveathall]

I found this on another forum, I do not know how accurate it is, I do remember once reading about the bracelet sizes somewhere but cant remember where.

I did some research on this several years ago, as there were urban rumours that the J stood for 'Made in Japan' and the K for 'Made in Korea'.... or J meant the watch came with a bracelet and K meant a strap....and this is what I eventually found...

Seiko J1 and K1 models

FAQ: What's the difference between Seiko J1 models and the K1 models.

The J1 models are for the Far and Middle East markets. They have the days in English and Arabic. They have to say ‘Made in Japan’ on the face. Some have a rubber strap, others have a bracelet. The J1 models often have a shorter bracelet to suit the smaller wrist of that market place.

The K1 models are for the European market and they have the days in English and French/Spanish. Again, they can come with a rubber strap, or a bracelet, but for the European market, they have the full size bracelet.

There is absolutely no difference in build quality.

The above is a quote, not my research or words.