What is this sticker on the interior cover? 0

[ramrodcar]

Title says it all, it's from an early 70's DC book; is this an early form of an anti-theft tag? A golden ticket ala Willy Wonka?

I did the google thing and it let me down

 

[fett]

congrats looks like you found one of the comics from the Mary Poppins pedigree.  

[Brock]

I think it's one of those things where the charity mails your mom 300 stickers for sealing envelopes in the desperate hope that she'll feel guilty and make a donation, and eight-year-old you finds the sheet of stickers six months later and decides that - since you are the ONLY one in the wide-eyed world of eight year olds with these stickers - you will repurpose these as personal identification tags and stick one in every single one of your comics books, because it's SOOO much more sophisticated than just writing your name on the cover.

Not that I would ever have done something like that, of course... 

Edited May 19, 2023 by Brock

[divad]

Well, it's certainly NOT the Penguin's umbrella . . .