Model J
From Wikisocion
Model J (Модель Ю in Russian) is an early socionic model which contains the functions 1, 2, 4 and 5 of Model A. Augusta created Model J simply as a visual representation of Carl Jung's descriptions of four functions of the psyche. Later, as she developed her theory, she replaced Model J with Model A, which contained all eight IM elements and provided a fuller picture of the psyche and information interaction between types.
In Model J, for example, an ILE would be: 
Today Model J is used by a small handful of "old school" socionists, most notably Ekaterina Filatova.
References:
