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If it helps to start to figure this out, I have a-500A (Orange dial) with 'Divers 150m' in blue text. S/N is 8700xx.
I also have a -5009 (Black Arnie) with 'Divers 150m' in Yellow/orangy. S/N is 7401xx
I also have a -5009 (Black Arnie) with 'Divers 150m' in Yellow/orangy. S/N is 7401xx
