re: Vintage IWC Calibre Identification (1920's) by Shimano on Mar 27,2008 02:56 PM You can ask for details at iwc.ch. I have a watch with the same caliber +55231 and I am waiting the papers from IWC. Does anybody have an ideea around how much can cost the hand for minutes and seconds and the window and the background with numbers ? I want to repair it at IWC with original pieces but I need to know first the price :) Thank you !