8 Reales Counterstamp Coins

That appears to be the Counterstamp that the Philippines used

I dont see anything that stands out as fake to me. The Counter-Stamp appears to match all that I've seen in the past.

For the counterstamp, you need a specialist, those are heavily counterfeit.
They all look odd to me, but I'm overly suspicious usually :D

I use the following website to help evaluate these counterstamps. You'll need to scroll down on each page to see the counterstamp info. Comparing the counterstamps on your coins to those illustrated, here's how I see them.

http://manilagalleontrade.webs.com/...18331868.htm

The crown on the YII counterstamp looks way too narrow compared to the full, round design of those on the website.

http://manilagalleontrade.webs.com/...18081833.htm

The field on the first F7 counterstamp for your coin looks too plentiful compared to the website photos. I don't know if that kind of variation is normal or not.

For the second F7 counterstamp, I don't see the cross element at the top of the crown on your coin. Could be due to wear, or just the interaction with design elements of the original coin. I'd look for evidence of that cross on counterstamp and then evaluate from there.

That's my 2 cents, for what they are worth.