Probably impossible, but help with 2 medieval European coins

I have these two coins I've been trying to ID for some time. First one weighs 0.4 grams and is around 15 mm in diameter if it were a full circle. The front has a large B in the margin, and maybe an O or D preceding it, and possibly an I after it. I can't make out anything in the design on that side, but it may be a portrait of a king or something. On the other side, the text has a large D or U, and a smaller C after it (the letters on medieval silvers are hard to read for me usually). As can be seen in the third picture, there is a design of some sort of plant. Seems to be made from billon or some low grade silver. My guess would be Spanish of some kind based on where it came from (lot that had many Spanish metal detecting finds).





Second coin is 29 mm in diameter and weighs 8.95 grams (although this coin surely weighed more when it wasn't corroded and worn). Front appears to have a left facing portrait, looks kind of like Napoleon III but the position of the text on the other side doesn't match with his 10 centimes. There seems to be text around it but nothing is decipherable. On the other side there is "RA" which makes me thing maybe it's a French coin, and across from that maybe an "N". Seems like a bottom of a shield is visible when looking at picture 2 although if you rotate it it might be a left facing portrait with long straight hair similar to one of the Queen Victoria portraits. But I think picture two is the correct alignment. This coin came from a lot of cull world coppers so other than "RA" being part of France I have no guesses as to origin.




Doubt these can be identified but any help is greatly appreciated.

2nd coin
https://en.numista.com/catalogue/pieces5466.html
https://en.numista.com/catalogue/pieces40926.html
as when I saw RA lettering the A look like one of those with E alongside
like Æ then the letter before it looked like another R so is RRÆ possibly (and in the correct place
on the reverse). Also I agree with the shield, and other side looking like a left-facing portrait.
So putting copper and 28-30mm plus maybe years 1700-1899 also in a search comes up with
https://en.numista.com/catalogue/index.php?mode=avance&p=1&l=&r=&e=&d=shield&ca=3&no=&i=*RR%C3%86&v=&m=Copper&a=1700-1899&t=28-30&dg=&w=&u=&f=&g=&c=&tb=y&tc=y&tn=y&tp=y&tt=y&te=y&cat=y
of which the links shown were the only 2 results found.
The only surviving letters are on a top layer of original coin reverse and the rest has gone;
I made these (with maybe another A before other lettering) ...

Thank you very much, this matches for sure. I never found it because I was looking at just "RA" and not the AE together. Looks like it may be the second one but I can't say for sure (thing underneath the shield seems like the animal and not a letter but it's hard to tell). Now hopefully someone can shed light on #1 too.