El Salvador Coins - Composition variants

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Based on natbaj's query on a different threads, I did a XRF / PMI analysis on El Salvador coins I have.

 

 

Reference Coins:

 

 

Reference Threads:

 

Photographs:

Thank you VERY much! This is crucial for our research on the Salvador.

So, what is your verdict as an engineer working with metals, about composition of Stainless steel coins? 

In our conversation you mentioned the majority of the XRF PMI signal comes from the surface, assumed numbers from what I read are 10-50 microns, inclined to lower values. Since the coatings are ~10-15 microns the readings will take only the surface, which can be read from the table. So basically we cannot know is it a coating or a solid metal, but we can take an educated guess if it's common alloy of stainless steel, if I understood you correctly, neotilva?

Sharing this so the others get the bigger picture.

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