i found some info from a guy on facebook
This may point you in the right direction. COIN SILVER Kirk made COIN silver from the early days of 1815 and into 1896. They did not start making 925/1000 silver (Sterling) until the mid 1880s. The coin silver will be marked either 11OZ or 10.15 which often shows up as 1015 due to the dot being worn off. This is not 925/1000 silver. Silver is weighed in TROY ounces, not US ounces as most Americans are used to. 11OZ means the silver is 11/12th silver or .9166 percent pure silver. 10.15 silver is .8458 pure silver. Again... Sterling is .925
Coin silver was made from ... COINS, that were melted down and remade into silverware and hollow wares. Much of the old coin silver was "traded in" when Sterling Silver was bought. The coin silver was melted and pure silver added to bring it up to the .925 standard of sterling.
The White House traded in various odd pieces of silver when the Cleveland administration wanted new silver in the early 1890's. S. Kirk & Son made the new silver for them. (Kirk recreated the pattern in 1952 for the White House and in 1992 KIRK STIEFF again recreated the 1892 pattern as replacement pieces were needed
Sent from my LG-LS980 using Tapatalk