yes, this is a Heuer Discussion Forum, but I am guessing that some of us may own Speedmasters and will be interested to see the history of these chronographs, as written by our own Chuck Maddox . . . appearing in this month's International Watch magazine.
The link below will take you to the first part of the article, as it appears on the IW website. To get the rest of the article (and the amazing photos and images), run to you local magazine stand or call IW to buy a copy. Even better, buy yourself a subsrciption, as they are making a real effort to provide the vintage coverage, and should be rewarded for this commitment!!.
Jeff