HaegerAshtrays.com
No. 1044-S
Nesting or Stacking Ashtray 5½" circa 1966-1969, Peacock glaze, photos from the collection of Troy LaFollette
Note: 1044-S and 1044 appear to be the same design and an example marked 1044 is not known. 1044-S is listed in catalogs 1968-1969, and 1044 is listed 1966-1967.
Further to suggest that they are the same design, in one of the catalogs where they appear as 1044 they are listed as 1044-S in the index at the back of the catalog.
Bottom reads: HAEGER 1044-S