I wish I knew because I have two pieces I have researched for hours. Like the Gieko says, "Will someone please help me?"
IS stands for Inlaid silver. ie Holmes and Edwards have a full line of Inlaid silver, which is major improvement over silver palte and the IS is stamped on each piece, usualy in a square box stamp
International Silver - the company that took them over in 1898.
silverplate!
The "IS" silver marking on flatware stands for "International Silver Company". The flatware is silver plated. Visit the link below for details about other silver markings too.
No. It's just steel no silver at all. If it is silver plated it will say so, but that does not mean it contains silver. A plus A nicely made set of stainless steel flatware may not be silver, but you don't have to take it out of it's presentation box once a month to polish it.
International Silver Co. according to the website antiquesandthearts.com
International Silver Company, founded in 1898 from a number of smaller silver manufacturers that specialized in silver plated tableware.
IS stands for the International Silver Co. and unless it says sterling or 925/1000 it is silver plate.
The phrase "pearl silver" was stamped on flatware that was actually nickel silver, that is made of copper, zinc and nickel with no silver content.
The Oneida is a company that creates Silver Holloware & Flatware. I actually have a fork from the onedia community, so I know they specialize in Silver Plates Flatware and Holloware. So I would think par plate would mean Silver Plate.
Wm Rogers Reinforced Plate AA IS on flatware is a code for the maker and the type of silver used. Wm Rogers is the maker. Reinforced plate means that it is not 100% silver, but a silver plated metal. The AA and IS are codes for where it was manufactured.
Oneida sterling flatware had a mark with a "cube" on the left side of the name. According to my reference, it is "The silver cube. Our silversmiths' mark of excellence," and was used since 1965. The cube is apparently a mark of excellence. (American Sterling Silver Flatware, by Maryanne Dolan.)