What This Coin Looks Like (Obverse, Reverse, Mint Mark Location, Special Features, etc.): There were two major varieties of the 1850 Liberty Head $10 Gold Eagle. This variety depicted above features a Large Date with noticeably larger numbers in the 1850 date - while the other variety features smaller numbers. The small date variety is slightly rarer and more valuable. The difference between the Large Date vs Small Date is depicted below in the example comparison image. Note how the number "1" in the 1850 Large Date is much closer to the left side of the liberty bust than the Small Date variety (Source of example images is courtesy of Heritage Auction Galleries):
Coin Value Chart: Typical Coin Prices, Values and Worth in USD based on Grade/Condition