The mint marks on an 1877 5 Mark Hamburg gold piece can typically be found on the reverse side of the coin. For Hamburg issues, the mint mark is usually represented by a "C" for the Hamburg mint. If your coin has no mint mark, it was struck in a different location, as the mint marks can indicate the place of minting. Always consult a reputable coin guide or numismatic expert for precise identification and valuation.
The actual gold weight is .24187oz of pure gold.
Only two pieces were struck in 1877 and both are in the National collection at the Smithsonian.
Assuming no mint marks and depending on the grade retail values are $336.00-$740.00
If it shows evidence of wear or significant contact marks, its value is $300-$350 If uncirculated, and with very few contact marks, it's worth $800-$1800
Dates and mint marks are needed for an accurate assessment, please post new question with more information
Values for a circulated 1877 $20.00 dollar gold coin are: $1,460.00-$1,850.00 And mint state starting at $2,000.00
The 1887 $5 gold piece contains 0.24187 of a troy ounce of gold.
The Karet weight of a piece of gold states how much of the piece is actual gold and not silver or copper. A piece that is 22k means that it is 91. 6% pure gold.
The 1880 $10 gold piece contains 0.48375 troy ounce of gold.
When found 'native' it is a gold nuggett When provessed into a shape and purified it is an ingot.
724 mark means that it has 72.40% gold or 17.34carat of gold
18K gold is 75% pure gold, so to calculate how much gold is in an 18K piece, you would take the weight of the piece and multiply it by 0.75. This will give you the weight of the pure gold content in the 18K piece.