Does anyone know the name of this 1957 watch?

I've posted this before with no responses, still trying to find the name. I've been searching the internet for information on this watch and haven't seen any like it.  There are a few things I do know about the watch that it is a 1957 (L7), it states 14K gold, 17 jewels, 5AF.  I'm not sure if you can tell from the picture, but it has a double strand.  The hands on the watch are blue and the watch is a wind up.  I would like to know any info that anyone might have and possible value.

 

Thanks!