From: "The American artisan and hardware record, Volume 81" ; 1921
"The Viking Specialty Company of Worcester, Massachusetts, has been incorporated under the laws of Massachusetts with a capital stock of $10,000 to manufacture hardware and tools. The incorporators, directors, and officers are: President, Willis R. Smith, Auburn; Treasurer, William E. Gifford; Clerk, Frederick A. Nelson. The company is looking for a location."
They seem to have found a location by 1922
"American machinist" 1922
Wrenches, Socket:
Viking- Specialty Co., 25 Bartlett St., Worcester, Mass. The wrenches are put up In Sets of various combinations for automobile work. The general service set comprises a double-end ..."
[That's all the snippet would give me]