Also known as • Adler (Protos) • Klein-Adler (Protos)
Serial Number Table Last Edited: 01/1/13 04:15
NOTE: dates shown are JAN 1 unless noted, so the serial number shown is the *first* serial number produced the given year. Exceptions are serial numbers preceded by "up to"(where you can assume that the numbers reported in that subsection are DECEMBER 31, END OF YEAR NUMBERS) or rows where a month is given in the month column. If the serial number is shown as a range (xxxx-xxxx) it indicates that we know the entire range of serial numbers for the given year.
|Models and s/n||Y||M||D||Remarks||Ref.|
|1922||identical with Adler Model 7||4|
|up to 6000||1922-1924||exchangeable typelever-set||4+7|
|Protos Portable||1924||same as Klein-Adler 3 row keyboard machine, but larger and minor technical differences, casing and top out of aluminium||4|
|1925||production of all Protos Models ended|