I have a snoopy keychain from around 1965 per the copyrights on the packaging. The keychain is of Snoopy in lederhosen, holding a beer stein. The keychain is was distributed by Hollywood Accessories which also made other Snoopy and Woodstock keychains around the same time; the packaging shown for these similar keychains on eBay is almost identical except for the keychains themselves and the part numbers, this keychain is part #278C.
The keychain is new, in the original packaging - the top punchout where it would have been stored on a rack is even still in place. There's the remnant of a price tag (all you can read now is "hardware") on the face of the packaging.
I've Googled and checked eBay history without being able to find any reference to this particular style of keychain.