As far as I can see from your photos, it doesn't say "Apple" anywhere on the label, but it has the model number and design of an Apple charger, so it has to be

As far as I can see from your photos, it doesn't say "Apple" anywhere on the label, but it has the model number and design of an Apple charger, so it has to be a counterfeit. How the Apple Store was selling this, I don't know. By the way the sentence “CAUTION: For use with information technology equipment.” also appears on legitimate chargers, so that isn't a sign of anything.