It is a date stamp. The numbers should be in a diamond pattern on the stamp. The 1 on top the 8 on bottom and the 56 together in the middle. It means the piece was made in 1856.
99 on silver means 99% (or more) silver, or pure silver. Sterling silver is marked 925 (or 92.5%).
331 mean on silver
The marking "523" on silver indicates the purity of the metal, specifically that it contains 52.3% silver. This is not a common standard for silver, as most silver items are typically marked with 925 (sterling silver, which is 92.5% silver) or other recognized purity levels. The "523" mark may suggest that the item is a lower-grade silver alloy. Always verify with a professional if the authenticity and quality of the item are in question.
1568 where is your calculator
To express 1568 in exponential form, first, we can factor it into its prime factors. The prime factorization of 1568 is (2^4 \times 7^1 \times 11^1). Therefore, in exponential form, 1568 can be written as (2^4 \times 7^1 \times 11^1).
not a clue
"760" marked on any silver means that the object contains 76% silver (and 24% other metals).
99 on silver means 99% (or more) silver, or pure silver. Sterling silver is marked 925 (or 92.5%).
No. Jewelry stamped 925, .925 or "sterling" is genuine sterling, not silverplate.
925 = silver, gold color = gold plating
"966 sterling" does not have a standard meaning in relation to silver or sterling silver. Typically, sterling silver is marked with "925" to indicate its purity level of 92.5% silver. If you have a piece marked as "966 sterling," it may be a manufacturer's unique stamp or a mis-marking.
MDRMultidrug-ResistantMDRMedical Device ReportingMDRMulti Drug Resistance
If it's .550, not just 550 it is referring to the percent (.550x100=55%) of silver the product is made from.
This means that the item is 80% silver and 20% alloy. Sterling silver is 92.5% Silver and 7.5% alloy. Many silver items produced in Mexico are marked 800 or 80.0.
Sterling silver is marked .925; fine silver is marked .999. It appears 3645 may be a pattern or product number.
Silver is marked on the 25th year of marriage.
I don't know, but I have what looks like a very old sterling silver pin. It is only marked SGW. Wish I knew!