This is Heuers 90 year anniversary watch. It was also promoted as Heuers "Half of a Millenium" watch, as it was launced in 1950.
The ref. number is 1806 and was available in chrome, steel or goldplated. Mine is chrome and has a lot of wear.
The movement is a hammer automatic from AS. The caseback is snap on made of steel.
I love the blue "snake" date hand.
It was really nice to find a old ad with the ref.number 1806 and anniversary information.
A cool vintage Heuer, even if it's not a chronograph.
Jarl
http://classicheuers.blogspot.com/