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I got some more info from another forum...November 17 2010 at 9:44 PM
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Chascomm (Login Chascomm_)
Chinese Watch Guru
from IP address 220.127.116.11
Response to Timex Self-Wind – the poor man’s Pellaton
Well it ain't so. The Timex Self-Wind/Automatic was made in Scotland from 1960, so US production could possibly even be earlier. Either IWC saw no benefit in maintaining Pellaton's patent and allowed it to lapse early, or else Swiss patents had no validity in the US or UK. Otherwise there is simply no way that Timex could have built this thing. Apart from switching a lobed cam for one of circular profile, there is simply no geometrical or functional difference with the device so prized by IWC.
Seiko of course did bring something new into the picture by reducing the entire assemblage to a single part, hence their own patent application. And they could argue the case that a crank-type connection to the rotor is substantially different from a cam-type connection.
But Timex had no such argument. As I see it, if Pellaton's patent was maintained for its full duration, then Timex must have been in infringement of it. I can't see them taking that risk. Therefore it seems that IWC did not value their in-house auto-winding system back in the 1950s so much as they do today.
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