For trade
Probably Spanish, but more information about it would need to be provided.
To answer your question directly, I would need to know the denomination and date of your coin. To find out for yourself, go to www.coinfacts.com
There is a 2 cent euro coin, so to get 12 cents, you would need a 10 cent coin and a 2 cent coin.
The only relation that I can see if that countries who issue commemoratives coins which they offer to collectors at a price above their face value, need to design these coins so that they appeal to collectors. Therefore a coin designer would need to know what coin collectors like .
The 100 ptas coin is a Spanish coin. The British Halfcrown coin has a face value of Two Shillings and Sixpence. To get a valuation on either coin, you would need to provide the date and condition of the coin.
To get that specific of a grade on a coin, it would need to be professionally graded though a service like PGCS, though a coin dealer in a shop could give an approximate grade.
you would need a type of coin and a year
Hi, Confoederatio Helvetica is Switzerland. To give a value, we would need the denomination of the coin. How many rappen or francs does the coin say it is worth?
The value of a 20 mark gold coin from 1909 would depend on its condition, rarity, and current market demand. You would need to consult with a numismatic expert or appraiser to get an accurate valuation for this specific coin.
A single isolated tool or piece of artwork that does not show evidence of settlements, infrastructure, or social complexity would not be considered evidence of a civilization. Artefacts need to be part of a broader context of material culture to demonstrate the existence of a civilization.
That is a very tough question to answer. There are several denominations of Roman bronze coins, so for that, I would need more information on the coin.
I would suggest going to the bank. You can purchase these coins there. If they don't have any go to the nearest coin shop and see if they have what you want.