Fake.
1) Faded and blurry print. Authentic ATH product images on the packaging have shiney sheen that looks like it’s coming off of the box. This is hard to show in pictures but very clear if you hold 2 side by side in varying light.
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2) Thin, light, cheap cardboard. Genuine ATH packaging use a thicker, 2-ply cardboard. This fake one that Massdrop sold is of wrong weight, thickness, and quality.
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3) Manufacture date sticker - should be rounded corner, not sharp corners.
Barcode UPC sticker should be shiney - not a plain cheaply printed one.
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4) L/R print should be bright and clear, as on my CKR10. On these fakes they look faded (again easy to tell if you compare to genuine products)
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5) Many other little things, such as cable material, cable relief material, microphone control cutout is wrong depth, etc. too many to list.
Avoid purchasing anything expensive and rare from Massdrop.