That 9.25 percent of the chain is silver the rest is of various
what does sp mean on a gold chain
.925 is the quality mark for sterling silver.
What is the 925/PT mean on made in Italy gold chain
KA 1772 is likely a maker's mark or a hallmark indicating the manufacturer or brand of the necklace. You can try researching the mark online or visiting a jeweler who may be able to help you identify the origin of the necklace bearing this mark.
The hallmark of 926 would indicate 92.6% silver, not gold.
1963 US dimes, quarters, and half dollars were made of an alloy of 90% silver and 10% copper. The alloyed and pure silver weights of these coins were: Dime: 2.5 gm / 2.25 gm Quarter: 6.25 gm / 5.625 gm Half: 12.5 gm / 11.25 gm
I assume you mean "18K". It is called "vermeil", meaning gold-plated silver.
It is gold plated on sterling silver
the 4.3 has a chain, luckily gm was smart enough not to put a belt in them.
925 is the mark for sterling silver, meaning the piece is 92.5% silver with 8.5% of other metals, usually copper.
Beginning in1965, dimes were made without silver. Up to 1964, dimes were made of 90% silver. The nominal weight was 2.5 gm so 0.90 * 2.5 gm = 2.25 gm of pure silver.