Francisco Posted October 16, 2009 Report Share Posted October 16, 2009 This is a Porsche with A7750 movement. The day/date cannot be changed using the crown. However, the change works at midnight, as following videos shows: Therefore, given the problem that this watch has, there are two possible sources: a keyless work problem or a problem in the piece that pushes the two day/date wheels (double corrector). So we know where to have a look. The screwed case back is removed: The movement is removed: Time to remove hands and dial: It is very easy to remove the day wheel: Red arrow in following picture shows the piece that pushes the day/date wheels (double corrector) when the crown is rotated. As it was said before, this piece is one candidate to be the source of the problem. When I touched it to examine it Quote Link to comment Share on other sites More sharing options...
Toadtorrent Posted October 16, 2009 Report Share Posted October 16, 2009 Love it love it love it. Thanks again for some awesome info. Quote Link to comment Share on other sites More sharing options...
DuDro Posted October 16, 2009 Report Share Posted October 16, 2009 Great tutorial! I've experimented on my own to fix a similar problem. Not easy for the untrained or faint of heart... Quote Link to comment Share on other sites More sharing options...
Slartibartfast Posted October 16, 2009 Report Share Posted October 16, 2009 Excellent source of information for the brave. Keep them coming! Quote Link to comment Share on other sites More sharing options...
Jkay Posted October 17, 2009 Report Share Posted October 17, 2009 I enjoy these tutorials very much! Quote Link to comment Share on other sites More sharing options...
Rolexman Posted November 15, 2009 Report Share Posted November 15, 2009 Here's a problem I once had with the manual date change. Just ading more info to the already great post ! Quote Link to comment Share on other sites More sharing options...
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