This image is in the archives at The Chester County Historical Society in West Chester. It’s the only one they have related to The Guernsey Cow in their archives.
[They have a nice service there where you can pay them to research a topic or multiple topics and determine what information and photos they have on record. Or you can go in yourself and dig around in the library reading room. Someday I’ll spend afternoons there mining their collection for various historical tidbits.]
The Guernsey Cow was famous for its ice cream and for its hand-made cream caramels. The caramels were cooked up in huge copper kettles with big wooden paddles. The caramels were wrapped in branded wax paper and then stuffed into the tubs like those shown. The lid had a die-cut guernsey cow head in it that popped out and made a nice way of pulling caramels out as you needed.
“Famous Cream Caramels from the World’s Largest Guernsey Cow” is the slogan on the side of the tub and as referenced in a previous post they were also famous among the famous. For the long-distance traveler they were the perfect take-home product when you couldn’t take the ice cream with you.
The Guernsey Cow, Exton, Pennsylvania 
Loved the caramels, but my special memories were:
Hamburger platter with famous french fries & coleslaw
Teddy bear honey
ICE CREAM!! Butter brickle (BEST ever!); Peppermint Stick (is that name correct?); Maple Walnut (my dad’s favorite); Mint Chocolate Chip!! Our family, as well as the Stewart family, both of Middletown Township, LOVED the Guernsey COW! We would make it a weekend outing.