Dąbrowski has an unidentified “American Masonic Symbols”, see below. There are quite a few symbols on it that are unfamiliar to me, such as this one. I don’t know in what rite or degree this combination is of significance.
In the early ‘high degree’ “Maître en Israel” (‘Master from Israel’) there are: “three vases serving for purifications”, but there is no snake there. The same description can be found in the “Maitre Anglais” (‘English Master’) degree in the Bonseigneur collection.
Dąbrowski P. 180. Year and designer unknown