I haven't seen anything suggestion that Akros are being counterfeit, but they are expensive so would be a likely target.

How do you tell ??
I'd look at the quality, they are premium and are (at least the ones I've seen) build with premium materials.
Look at the badge, does it look quality? does it look like it's always been there, is it straight?
Are the rivets in-line, the holes right, no rough machined edges.

Just the normal things to look for with any product if you are unsure of it's originality.

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