I have a heuer skipper circa 1966. Features are:

Blue dial, with two smaller dials one a constant second hand (light green in colour) the other a 15 minute countback dial divided into 3 X 5 minute sections, two sections are different shades of green, the last 5 minutes section is shaded red. Case is stainless steel with stop start buttons either side of the wind button.
The large sweep second hand is red and is activated at the commencement of the race 15 minute start sequence. Case has numbers 106649 @ 12 oclock and 7753 @ 6 oclock.

I am able to find information on later model skippers bu not the 1960s vintage I have. Can anyone assist?

steveh