Authentic? 2 Spanish Reales 8R From 1618 (Philip III) & 1745 (Philip V)

inherited a bunch of coins but these two stood out. I'm wondering if they're real. They were in an attic for at least 20 years, so not originating from ebay. I saw a thread about fake cobs from China, made to look like they were in a shipwreck, however all those fakes look very non-circular, while these still show some circularity. I believe the 8R is supposed to be 37mm diameter, and these definitely are slightly smaller but appear like the edges were squashed inward.


The 8R from 1745 has the following characteristics:
weight 14g
diameter 32-35mm
thickness 1.6mm (thicker at some edges up to 2mm)








And this is what the coin is supposed to look like:





The 8R from 1618-1621 has the following characteristics:
weight 9g
diameter 32-35mm
thickness 1mm (thicker at some edges up to 2mm)







And this is what it is supposed to look like:





Here is the website someone pointed me to about fake cobs. Like I said, most of them are non-circular. Although these look a bit like the example #FC53637 from 1610F?

http://www.sedwickcoins.com/fake_cobs.htm