This was the last year that "Codewords" were included in the Spare Parts Catalog. Codewords were five-letter "words" which were to be used instead of part numbers when orders were send by Telegram or Cable. Part numbers ["18051-47"] were 8 characters, while codewords ["fakin"] were 5 characters - a savings of 3 characters. Today's Internet sends information about a million times faster than telegrams, but back then you had to pay by the character.