Door lock question 1950's

[barnstuf]

I have a FoMoCo two lock cylinders set, both lock cylinders use the same key. I believe these fit around 1953 to 1958. One lock cylinder is positively for a door, and my question is what does the other cylinder lock fit. Is it ignition, glove box or trunk. in other words what lock cylinder would use same key as a door lock. Upon identifying this combo they will be for sale. The Ford parts number on the box is CPA-7022050-A and the box printing says "cylinder and key set".