The Lazybones shaker is a significant marker design.
The development of the double-diamond started about 1950 and became company policy by the end of 1952.
The ardent collector can with some luck find this shaker 1) on Ada clay from the last year of that clay, 2) glazed in clay blue from the first year of that glaze, and 3) with the double diamond “S” pour hole pattern in its first full year of use.
The marks below are images we've captured on ceramics we have owned.
Debolt's Dictionary of American Pottery Marks is another good resource for identifying Ceramics that are white or off-white, often high-fired, including vitreous china and ironstone, and usually used for dinnerware or bathroom sets.
Frankoma Pottery was originally known as The Frank Potteries when John F. The factory opened in Ada, Oklahoma, then moved to Sapulpa, Oklahoma in 1938.
Early wares were made from a light cream-colored clay from Ada, Oklahoma, but in 1956 the company switched to a red burning clay from Sapulpa.
Paper labels are the least permanent marks, and many companies used a paper label and another method for marking wares.
If you are serious about learning pottery marks or identifying pottery, you'll need Lois Lehner's Encyclopedia Of US Marks On Pottery, Porcelain and Clay along with the Kovels' New Dictionary of Marks.
Some Frankoma pieces are, however, very puzzling- the WA2 pot warmer is a notable example.