The name of this toy was changed in 1932 to Jumbo Bak-Up and a patent number was assigned. Unlike the 1931 Jumbo, the 1932 Jumbo has a permenantly attached key in his side.

• 1931-1931 - Go 'n' Back Jumbo - FPT4167 - Orange wooden elephant with a colorful circus blanket on his back, orange oilcloth ears, a rope tail, a pipe-cleaner trunk with 6 wooden beads, and 4 orange wooden legs with big round feet. He has a wind-up motor with a detachable key that makes the elephant walk up to 50 feet. Measures 9" long x 6-3/4" high x 3-1/2" wide. *See "Variations" below.
• FPT4883 - Silver motor key.

• 1932-1934 - Jumbo Bak-Up - FPT4168 - Orange wooden elephant with a colorful circus blanket on his back, orange oilcloth ears, a rope tail, a pipe-cleaner trunk with 6 wooden beads, and 4 orange wooden legs with big round feet. He has a wind-up motor with a permenantly attached key in his side that makes the elephant walk up to 50 feet. Measures 9" long x 6-3/4" high x 3-1/2" wide.

• Jumbo was available as a promotional item for Jumbo Peanut butter. This elephant is NOT marked, "Fisher Price", nor marked with any Fisher-Price logo. Instead, the elephant's back has a promotional label marked, "JUMBO PEANUT BUTTER IS GOOD FOR THE KIDDIES, WRITE FOR FREE RECIPE BOOKLETS, THE FRANK TEA & SPICE COMPANY, CINCINNATI OHIO".
• Walky-Balky Toy Line.
• Patent applied for in 1931. 1932 Patent No. 1,800,874.