dont know about batch numbers but i know how to spot a fake rwr
first things first, i read a report on the a australian vet site that rwr lost their licence to produce these products in the year 2001 due to poor security. they still manufacture vet products but none are steroids. Only jurox still manufactures winny in australia as far as i know.
a date of manufacture of 02 is pretty sus to me first off.
second the bottle should have a purple metallic lid that is crimped securely to the top of the bottle. if its silver and slides when u attempt to turn it its probably bogus.
the most fakes out there are 20ml bottles so be wary...
also the winny powder should settle to the bottom if you let it sit for a while but this again is no sure way to know its real