Old Waldorf Bar Days by Albert Stevens Crockett (1931) — Old Waldorf Bar Days 1931, opening cocktail appendix

0.33 partcreme de cacao base
0.33 partLondon dry gin — Dry Ginbase
0.33 partcream other
  1. Prepare frappe.

Ice: Frappe

The Old Waldorf-Astoria Bar Book by Albert Stevens Crockett (1935, p.35)

0.33 partcreme de cacao base
0.33 partgin — dry ginbase
0.33 partcream — No ice.other
  1. Build the creme de cacao, dry gin, and cream without ice.
  2. Serve at once in a cocktail glass.

See also: Alexander

Source specifies no ice.