Robbins Type 0
1920

In 1920, the National Office contracted with the Robbins Company to manufacture the Eagle Scout medal.  They made the medals through 1978, all were sterling silver.  During the course of that time, they made 5 distinct types with a number of variations within the types.
 

The first Robbins medal was basically the same design as the Dieges & Clust which includes a indistinct pattern of lines on the back.  The difference is primarily in the scroll.  The lettering in the Robbins type 0 is smaller than the Deiges & Clust and there was only one knot on the wire loop.