I need help..
Unfortunately my father in law past away a few weeks ago. Looking through his stuff we came across a longines conquest automatic watch.
I really would like some info about it.
I have the book that came with it. I think it's not the original strap though.
The movement number is 51870714.
And reference number is 90439.
Think it was purchased in 1974.
I would like to know is it gold it looks it. And roughly what the value of it is. For insurance purposes.