I have an IWC WWW cal. 83. The mainspring just broke and I need to replace it. I see on some web sites (not all of them) which sell mainsprings that the part for the cal. 83 also works for the cal. 89, and vice-versa.
Is that true? I know what specifications the cal. 83 mainspring are: 1.40 X .12 X 340 X 10,5, but not sure if these are the same for the cal. 89.
Does anyone have an answer as obviously I wouldn't want to put the wrong type of spring in my cal. 83.
Many thanks in advance.
