Vintage AP Electric Blue dial

[Pixiedust]

Hello, Can anybody recognize this 1960´s, 1970´s piece? It has a very rare electric blue dial which is stunning. I can see there are other extra flat watches but this seems to be a rare piece which I cannot find any information on and difficult to value. Its got a white gold case numbered 42036 and a blue sapphire on the crown. Calibre 2003. Pity I cant post a picture yet, 5 posts remainging to be able to post image