Yost
				Merrit Bros., Springfield, U.S.A.
				Since 1907: Yost Typewriter Co., Bridgeport, U.S.A.
Models and s/n	Y	M	D	Remarks	Ref.
Standard manual
No. 1
	started 1887			"Unvisible" typing, ink pad machine, with 8 key-rows keyboard, Models Nos. 1-4 were sold as "New Yost" as well	4
No. 2
No. 4
	1895			Since 1907: Additional ribbon holder for two colour writing, where the ribbon is only as long as the carriage and fixed at both sides	4,13
Nos. 5, 6, 7, 8
				Model No. 4 with different carriage sizes	4
No. 10
	1905			For the european market, large model	4,13
	1908			Model with a mirror and a metal part instead of the platen, to see the written text, only a few sold	4
Nos. 11, 12, 13, 14
	1907			Model No. 10 with different cariage sizes	4,13
				Unvisible writing "Yosts" were produced until 1913, when "visible models were already available	4
No. 15
	1908			"Visible" typing, patented in 1907, 4-rows keyboard, 2 shift keys, ink pad machine	4,13
No. 18
	1908				4,13
No. 20
	1912			Decimal-tabulator, carriage sizes A-E	4,13
	1924			The production of all Yost machines ended	4,13