For sale is one Used Delco Remy Ignition switch that fits:
GM Group number 2.188  Part Number 1116504

Switch has (4) screw type connections on back.  They are Bat, Acc, Ign, Sol.
 
Part appears to be in Good Used Condition.  I tested switch with a series of test lights that I set up for that purpose. Tested good.

This switch was in a load of parts that I purchased from a salvage yard that closed in 1971.  
Most parts were pulled from the cars very early and stored on shelves inside buildings.  

NOTE:  The switch was labeled "52 Olds" by the salvage yard.  The same switch fits from 1952 Olds through 1955 Olds all.  The lock has replacement key.