In his 1948 The Fine Art of Mixing Drinks David A. Embury says, "At the St. Moritz Hotel this drink is served in Old-Fashioned glasses." It's spirit-forward...
This was really good with Wild Turkey 101 Rye, Yellow Chartreuse, & Dolin Dry. Not as herbal as I expected; great balance! Not overly boozy. A little sweet. Nice use of Yellow Chartreuse.