4x5.5” mailer from General Mills w/text including “Here’s Your Weather Ring!” Comes w/fold-over cardboard insert w/instructions. Ring has adjustable brass bands w/90% original luster. Top has clear plastic cover with faceted edges over a piece of litmus paper designed to change colors although no longer active. 1946. Handling creases to mailer and card but these are VF and rarely seen. Ring is extremely Fine, displays NM.