Browse this early-to-mid-50's (exact date unknown) Owners Manual, courtesy of Mark Waite & Joel Wicker.
[Source: Owner's Manual and Parts List, Simplicity Garden Tractors and Implements, date unknown, courtesy of Mark Waite & Joel Wicker]
Other information on Simplicity "walking tractors" is available at:
Models A, FC and VB, plus attachments, in 1957 Simplicity Product Catalog
Models W and LC, plus attachments, in 1962 Simplicity Product Catalog
Model W and mowers in 1969 Simplicity Product Catalog