AS 2063 Setting lever puzzle

hofnerpres · February 19

After a run of two ulcer watch resurrections a straightforward service on an unmolested AS 2063 was looking good until we found the classic broken set lever spring part No 51.090.06. They are very complicated on this movement since they incorporate a pivoted three gear system which controls the date and time settings. A search soon showed that all parts for this series are reasonably available except for this damn thing - they clearly like to self destruct. However, some kind sellers had listed a few similar AS series movements also using the part and after extending the search we found one in the UK. Photo list here of the factory packaging so you can see the range of movements this part fits and thus extend your search options .

So the two position spring gave a nice basic wind and second position, a well engineered and simple Non-plastic fast date change. Could not see how the hand setting was achieved - I failed to find any help on line and went to bed defeated. So after a hard examination it appears that the there is a third setting position - but no clear cutaway on the spring end part. The force required is too damn much since the sharp rise in the actual spring is too severe. This also causes excessive strain on the slender arm. In the photo below the broken lever has been laid next to the new one already in place and you can see that the shape has been factory modified. The blue arrow points to what is a well disguised third setting position. . The stiff action was relieved by stoning down the sharp area highlighted by the red arrow. Hope that helps. Coffee time..