I had already brought an Amazon Kombiwerkeug to shorten bracelet, with which you can also switch the spring pins. The wristband exchange can therefore be carried out quickly even (less than 5 minutes). On that occasion, the clock can then also be cleaned thoroughly once).
Quality and delivery top (thanks to Cty, Juw.!). Compared to the old tape could also clearly see how it had turned with time :). My clock now looks as good as new!