Two Jingle Cards featuring Happy and Doc, distributed by Vogelman's Bakery (based in Missouri). Sandwich recipes were included on the back.
A couple more bread cards with recipes on the back. No bakery name.
This set of cards was sold through Heritage Auctions.
An uncut sheet of all 24 cards.
These next Jingle Cards were not associated with a bread company. Rather, they were used in a laundry promotion, this one in Philadelphia. In the 1930s, the laundry truck would come to your home to pick up and drop off your garments.
Printed on the backside is one of two different informational blurbs. The first mentions that "a complete set of 24 pasted in your Jingle Book entitles you to a beautifully framed picture of your favorite Snow White character." The other reminds you to "look in your next Snow White Laundry bundle for another" Jingle Card. And to "ask your routeman about a Jingle Book if you don't have one."
Card images via aroundtheclock.
A red and black single-tone set of cards was issued too, listed here on page 835 of Hake's 2007 Official Price Guide to Disney Collectibles (2nd ed.). Also pictured is a series of 24 waxed paper strips, each with one of the four-line verses. Possibly used by some bakeries as substitutes to the paper picture cards.