The plastic piece does not look right, the tag is not right. The font varies from the bags - the beige one looks different from the burgundy one. The bag online has a plaid interior. I can't make out the writing on the front buttons. The stitching looks a bit odd on the burgundy handle and the inside of the beige one.
Also I am leary of anyone selling a brand new bag/new is stores. We have seen many fakes on here from Poshmark
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So I don't know about the plastic piece, but the font looks the exact same on both bags. Can you tell me how the font looks different to you? I've seen the real thing in the store and on the Burberry website; it has a plain solid interior, not plaid. The buttons say Burberry on the tops and England on the bottoms (both bags). I agree about the stitching though. It looks messy on one of the handles on the red/beige one.