Hello all from near Amsterdam. I am looking for a part of a very special stopwatch. I own the ACRP 4981-5000 stopwatch. Here is a picture and the backside model nr. It is a 360.000 bph monster, incredible. I have tried many online places, hopefully one of you can help me. The part I want is the stem of this stopwatch. Seiko part number 0241890. If you know of any place here to get this, please let me know.