The pattern was originally produced beginning in 1935, but production of the line in Milk Glass dates to 1956-1961. Some pieces became part of the Heritage line beginning in in the 1960's.
The pattern was originally produced by Gillinder and Sons, and was patented to Thomas Mellor in 1874.
Moved from Unknowns based on an ID by Paul Kirk.
Reference: "L. E. Smith Encyclopedia of Glass Patterns and Products" by Tom Felt on page 36
