Hi Piers
So much information,I have read a few hours,interresant to read the German stams were also hit in Swiss .The history of Longines is beautiful,etc....
I have the watchmaker with the brand AH in a saddle bracket not found yet. Mystery.
And then the number 69821? 821 is also stamp on the outer ring see photo ,it looks like there several lids placed on a basic watch case.Rare ?
Pierre