The Worcester Salt Co. was founded in Warsaw, New York in 1894 and and was absorbed by Morton Salt in 1943. These tokens were made in the 1920's or so and were an advertising tool, a lucky pocket piece and a membership token for the "Don't Worry Club" all in one."
Source (including pics) can be found here:
It's amazing how a good luck or "Don't Worry " symbol in the 1920's would strike terror into the hearts of millions in less then 20 years.
That's quite a find , Congrats