One of two designs from 1941 produced by Otsby & Barton of Rhode Island and issued by dairies participating in the “Superman Defense Club” milk program. Ring top features various initials of milk company sponsors, in this case the letter “B”. Below the initial is a diagonal lightning bolt and below that an eyeball surrounded by accent lines. The brass plate snaps off and the underside of the snap-off cover holds a paper sticker picturing and reading “Superman.” Condition is better than most examples. Only the last letter of “Superman” is partially incomplete. The top of the snap-off piece shows luster loss and these areas are browner in tone than the brighter gold luster still covering most of the background area. The ring base displays Mint as the former owner restored the luster by plating the base in 18K gold. Scarce.