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Scilly.Suffolk
I can't find a 7600 BB: perhaps Shimano reused the 7400 BB cups for the 7600 cranks (which use 109mm BB), hence the need for an NJS mark?>
Bingo, no such thing as 7600 cups, only 7600 spindle. 7400 cups come in British threading always marked NJS, also French and Italian - both non NJS.
A 7600 ensemble would probably cone without seals in the cups, a road set would though.