Jargar Viola Strings
What the maker says:
"They are made of a very flexible steel core and they produce a big, powerful, distinct and well-balanced tone. They are easily combined with other brands and especially the A string is often combined with other brands.
The G and C strings are also available with an upper winding of pure silver, which makes the sound more like gut strings. The G and C Silver Sound for viola is often combined with the normal A and D strings as a set to create a warmer and more round sound".