pop-out switch vs on-off switch

[31Tudor]

>In 1930 & '31 the Popout key was originally the same as the door lock key;

This statement is not entirely true. According to the Restoration and Judging Standards this first became available only on the Victoria in November of 1930. Then in December of 1930, this was extended to the Deluxe Delivery, Special Delivery and Panel Deliveries. It was after March 1931 that all vehicles used the same key for all locks, including the spare tire lock.