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If It Moves, Lock It!
It wasn't long after the automobile began its ride to popularity that aftermarket locks became available to protect the driver's valuables, including the car itself.

Hundreds of Ideas
Hundreds of ideas for locking devices began showing up at the patent office: some were good ideas, others, not so. Locks became available for wheels, spare tires, lap robes, foot pedals, gas lines, and in the case of the Model T Ford, even locks on top of locks.

The Demise of Accessory Locks
Most accessory locks became obsolete with the popularization of closed cars with their lockable doors and trunks, although a few remained for exterior use, such as for gas caps, fender skirts and even license plate frames.

Accessory Locks for Antique Cars

Spare Tire Nut Locks - Page 1

decker sparelok
Decker spare tire lock. A cutaway view is shown in the Technical pages.
graynie spare tire lock
Graynie spare tire lock
packard spare tire lock
Identified as a Packard spare tire lock
johnson spare tire lock
Johnson spare tire lock, photo from e-bay
auburn spare tire lock
Auburn spare tire lock
johnson spare tire lock
A different style spare tire lock by Johnson
hurd spare tire lock for chevrolet
Chevrolet spare tire lock by Hurd
hurd spare tire lock
This Hurd spare tire lock uses a different style lock cylincder
oakes spare tire lock
Oakes spare tire lock
gm spare tire lock early ca 1931
Identified as for Chevrolet and Oldsmobile, about 1931
Tire 1 Tire 2 Tire 3 Tire 4 Tire 5 Nut 1 Nut 2 Padlock 1 Padlock 2 Wheel 1 Ignition 1