Spanish Colonial Armchair?

What does the back of the chair (including stretcher) look like?

 

Here are a couple pics.

 

Fyi, I took off the crown and sides last night to investigate.

 

These appear to be straight regular mechanical saw marks, which would put this into the 19th century. Can we get a better pic of this area?

 

Upon taking off the crown and sides and looking closer, I've found that the crown is not original to the chair. There are 3 old holes on the top of the chair for pegs to secure the crown, and this crown does not have the same holes.
Ditto for the right side piece (if you're liking at the front of the chair). 2 old peg holes on the chair, but none on the piece... I had previously thought that piece looked newer, and noticed that very small carving details in the crown and right side did not match the left, which I believe to be original.
Out of curiosity, I think the original square nails are wrought iron, based on the corrosion on them and the wood. Does that play into anything for age in my case? Or, did victorians use wrought iron nails?

 

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Forgot to send the back of the bottom stretcher back.

 

More saw marks on left bottom stretcher. These don't look too regular to me though...

 

This is 19th century into early 20th, and not earlier period. And yes, you’ve discovered the later additions, look to me to have been done in Mexico, maybe mid 20th when hand carving and enhancement was still a thing.

 

Thanks!

To me, the stretcher looks hand carved, and not machine made. Do the experts here agree?

What wood is it, based on the grain? Oak?

 

I'm totally not an expert, but I believe it is oak. And yes, I agree it looks hand carved.

 

Mexico probably makes sense. My dad got it in Houston, so that's not a long distance for it to have traveled. I'm totally not disagreeing with you about the age, but it just comes off as much older with all the different repairs and agreed look...

 

As I said back on July 6th, definitely oak.