Perkeo
				Clemens Mueller A.G., Dresden, Germany
Models and s/n	Y	M	D	Remarks	Ref.
Portable
				Developed from the "Albus" from Carl Engler GmbH, Wien, Austria (1909), a three key-row aluminium machine	4
				The machine was sold in France with the name "Galiette"	4
Model 1
6000-6820	1912-1914				7,13
Model 2
up to 8000	1914-1920				7,13
20000-30000	1920-1924			Missing serial numbers could have been used for the Urania, see there	7,13
60000-62139	1924				7,13
Model 3
62140-70000	1924-1933				7,13