HaegerAshtrays.com
No. R-1821-S
Nesting Ashtray 4½" circa 1958, Bamboo glaze, photos from the collection of Michael Bono
Note: The above information is for R-1821 as R-1821-S has not been found in a catalog and they are assumed to be the same design. An example marked R-1821 is not known.
Bottom reads: ROYAL HAEGER R1821-S U.S.A.