I contacted the seller who seems quite honest and replied with the following:
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Good point, and I'm sorry, I can't tell you as I bought it as is (in about 2002), and have not replaced the wappen. So I can't elude to if it is a replacement or not. Looks period, with honest wear (to plate).
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I think it would've been a beautiful catch had it been in a better shape (the cork shell has started to disintegrate according to seller) with a more 'genuine' wappen.