Thanks for your thoughts,
Its interesting that looking on Google,you can easily find 13322 cases in stainless steel, 9k and 18k gold.
I can only think solid silver wasn't very popular?
I also questioned if the case is original to the movement,but I cant seem to find another brand other than longines that used the 13322.
If it was for a longines movement,then I guess the back would be stamped "baume"the importers name?
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