Thank you for the bigger pic.
Sorry, but it is a forgery. There are many differences from the original. However, to simplify things, three of the common tests it fails are:
-- there should be a black dot connecting the two outlines of the shield, located near the SE of "BASEL"
-- the L of "BASEL" should be slightly slanting backwards
-- the dot after Rp is too high
Numerous other differences, but the above are some of the usual tests. I've circled these tests in green in the genuine Basel dove below.


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