 Possibly to compensate for the slippage of the 1948 unit's elements, the cipher alphabet and number scales were placed on interlocking gears, preventing any slippage.Resetting the cipher elements utilized a small key that was inserted into slots over one of the gears, which could be disengaged, using the key and a leaf spring as a simple clutch mechanism.A Code-O-Graph-like secret decoder ring was featured in the 1983 movie "A Christmas Story" as an object of both joy and frustration.