I recently got my extract from the archives from Bienne regarding my newly purchased Flightmaster. it lists it as a 145.036, but my caseback is a 026. So, im looking for the correct caseback for this model, but the only casebacks i find is the 026 or 016. Ebay has plenty of 026, but not one 036 :-( What is the story here, are the 036 harder to find? Seems strange.. I have a NOS 026 caseback along with the caseback on my watch. So if anybody is interested to swap parts send me a PM. (Also listed a WTB ad)
New case backs are available, but they might have 1450036 inside since the numbering system has changed.... Not sure if that would work or if you want a true vintage one.