New Portuguese Set. Can you see what has me excited?

I recently bought this set on Instagram as I liked the look of it and the price was right. I got around to examining it today and found something cool! Can you guess what it is?

 

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I don't see it but I'm watching to find out what has you excited.

 

I'm not catching anything that really stands out, except maybe the mark on the obv of the smallest one (8oclock) but I don't know the coins either so don't know if that's special.. very pretty set though

 

I'll let the thread go for a day or so and if noone sees "it", I'll reveal!

 

Aaah, is very much a special mark!

 

The 5 escudos isn't a pattern is it...

 

I see that now..."prova" or pattern is marked on that one.

 

I didn't see it in the sellers photos either. I have actually not seen a Portuguese pattern. I've owned several Polish (edited that) and French ones though. Looks like the last certified example in MS66 brought around $150 in a heritage auction.

 

I found that HA sale as well.
Nice find in a set that looks even cooler now!

 

For anyone STILL following, I sent the Prova in. NGC graded it MS65. Should be here Saturday!