These two items are postal stationery - looks like postal cards, especially if the second one has writing on the back. My Scott catalog doesn't list them, but I've seen like items before. They look like they are in nice condition.
Scott's doesn't get into Mexican postal stationary or newspaper wrappers unfortunately. But I'd agree with Cursus that these both resemble postage stamps issued between 1886 and 1894.
Thanks guys for the comments. They are definitely not any card. They are envelopes neatly cut and it's contents removed.At the back of the second one there is a rubber stamp mark of Express Wells Fargo.
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