Executive Ashtray 14" circa 1957-1965, Aztec Sand glaze, photos courtesy Ready Goods Company on eBay

Note: 1755, R-1755, and R-1755-H appear to be the same design and examples marked 1755 amd R-1755-H are not known. 1755 is listed in catalogs 1966-1974, R-1755 is listed 1958-1965, and R-1755-H is listed in 1957.

Bottom reads:  ROYAL HAEGER R1755 USA