What are the model numbers for Gerber toilets made December 8 1983 with the letter A inside tank?

The model numbers for Gerber toilets manufactured on December 8, 1983, with the letter "A" inside the tank typically include the models such as the Gerber 21-228 and 21-230. However, to confirm the exact model number, it's recommended to reference the manufacturer's documentation or contact Gerber directly, as variations may exist.