Nyxator

Dear all, I was recently offered to buy a Liberty Head Five Dollars 1881. You can see the pictures attached below. Can you say if it is authentic or not from these pictures and, if it is, the approximate grade? would it be a good specimen to submit for grading? Thank you Marco

Dear all, I am relatively new in coin collecting and I would like to have expert opinions about this coin. I read some generic information on the American Mint website: https://catalog.usmint.gov/american-eagle-2018-one-ounce-gold-proof-coin-18EB.html And more generally on the America Gold Eagle program on Wikipedia: https://en.wikipedia.org/wiki/American_Gold_Eagle or on the NGC website In particular, several points remain obscure: 1) Are the minting differences between the proof and the bullion only in the addition of the "W" mark of the mint and the higher production standards, or is there something else? 2) More generally, are there appreciable differences between the 1986-2020 versions? 3) I don't get the quantities produced, on the mint website (first link) it says: Mintage Limit: None Product Limit: 25,000 Household Order Limit: None But how many of these coins were effectively produced? 4) Could you recommend some authoritative texts where I can find detailed information? 5) Finally, the aforementioned coin (which I like very much) was offered to me by a very serious and reliable seller (in the original mint condition). Which would be a fair price (also considering the current value of gold)? Could this coin have future collectible value, having been produced in limited quantities and in relation to the popularity of the American Gold Eagles? (I am thinking to both the US and European market) I thank you in advance for the information which I am sure you will provide Marco