ZETA
				Kovo Limited, Prague, Czechoslowakia
Models and s/n	Y	M	D	Remarks	Ref.
Standard manual
ZETA 1501
	starting 1949				13
Portable
ZETA 1511
	starting 1951				13
Consul
	up to 1960			The serial numbers from the Remington license models before 1960 seem to have the prefix "ZP"	12
#MM(M)ssssss	from 1960			The first digit of serial number indicates the year of production (4 means 1964), followed by model number (2 or 3 digits), followed by the machine's s/n of 6 digits	12
For further information please look at Will Davis' Portable Typewriter page : http://www.hometown.aol.com/page3.html