Popeye and Olive Picture Frames by "King Features".
King Features was founded by William Randolph Hearst in 1915 under the direction of Moses Koenigsberg who wrote an autobiographical history of the company, King news (1941) Sylvan Back was the head editor of the syndicates comic features for several decades from the 1950s through to 1970s.

Koenig is German for king
Launched king F Syndicate November 16th 1915

A bit of history, very interesting