I agree with Lesbian Cow you would need to take individual
images of the coins front and back so that people can see
exactly what you have and what state they are in.
to clean or not to clean is a long running debate, personally
I like clean coins so that I can see the details of the coin rather
than the crap it has gathered throughout its life.
I didnt follow all the links you provided but judging from the
ones I did there are a lot of common coins which are not worth
that much apart from this:
There was only approximately 5000 of those coins minted, its
not gold or silver but the rarity is what is of interest.
Thats if it is this coin >
https://www.ngccoin.com/price-guide/world/spain-peseta-km-775-1946-48-1963-67-cuid-1082184-duid-1516025https://www.silveragecoins.com/en/details.php?item=8531EBAY Listing number 333051181011
Yes most of them are pretty old and low on price, i dont want to deteriorate them by cleaning and most have details appreciable with 4x magnifying glass.. check the google drive folder for pictures of all the coins front and back, there is one which i took several pics trying to take a good pic of the shield which is amazing for such old coin imho.
check the drive folder, i cannot put a lot of the pics because their size are over 20 mb
Edit: wow thanks for that page there is a few coins from year 47' im not sure about that 46 but i could think i seen it, i will look at the years of emission of that year whenever i get to manipulate them.