I finally got my 1971 speedmaster back from a spa treatment. It has been put in a new replacement case so that it is more suitable for everyday wear and that I don't have to worry about the seals (yes, and i've kept the original case so that I can always put it back).
Really pleased to have this one back in the collection, everything seems fine, even had a case back protector on it this time, which I removed to check all was in order! Sun has gone down but still warm enough to sit outside for a beer and Davidoff.