Thanks, quite surprised by the momovement actually, wound it yesterday about 2pm, probably only half way as well, and it's been sat on the table since and was still going lunch time today and keeping good time.
Funny you mentioned the diving watches because when I saw this for £10 I had a feeling I knew the brand. I actually remember I saw a camy diving watch at an antiques fair but it was overpriced. It had an interesting colour combination which caught my eye.
To my eye it all looks original. There's some dust on the face but it is in good condition. I also found an engraving on the case which I think indicates it was gold plated. Let me try the images again, try these links