The Breitling Watch Source Forums

This watch came across my ebay trawl. A contemporary of the original chronomat, it is another take on the slide rule watch from the Forties.
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... K:MEWAX:IT

It's interesting to see the different approach to the case design compared to the Chronomat.

It also seems as if Breitling might have been pipped to the post by a company called Mimo-Loga, who are credited with a slide rule watch a year earlier than Breitling.
http://www.invenitetfecit.com/modeles/p ... nomat.html

It looks as if the design goes back even further to a pocket watch slide rule.
http://xtrememeantime.forumotion.com/ho ... -t3567.htm

Of all of these watches though, Breitling is the only one to add a chronograph into the mix.