Jeff G.:
Thanks for the effort and true it is a "Crown" over maybe "N". Also are those monograms just ahead of the flats; one between the flat and 16.1 and the other really beside the 16.0. I'll have to check my files but I think Nowotny had a similar mark like all 3 if you can make-out an intertwined "JN" out of the marks.

Kind Regards,

Raimey
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