Simplified export model for ABC small typewriter 
Brand: ABC Also known as • ADS • APSCO • Avona • Cole Steel • Collegiate (ABC)
Serial Number Table Last Edited: 01/24/18 12:54
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.|
|2000||1956||Introduced by Koch's Eagle Sewing Machine Company of Bielefeld, West Germany in 1955, first model styled by Prof. W. Wagenfeld ended in 1963. Numbers approximate and probably derived from warranty card/receipt research by Dingwerth.||140,142|
|40000||1958||ABC portable was relabeled as "Cole-Steel" for sale in the USA through Cole Steel Equipment Company.||140,142|
|???||1959||Sales division transferred to "Cole Steel Office Machines".
Noted design changes:
43 to 44 keys: Somewhere between 44600 and 53100
Two color ribbon: Somewhere between 53100 and 54300
|90000||1960||Serial number 3-149323, a Cole-Steel, is known to have been purchased originally on March 21, 1960.
A new, minimalist "abc" logo is introduced. Possible series jump to 200000.
|230000(?)||1963||Two new models introduced: ABC 1300 (ended 1966-67) and ABC 2000 (ended 1973)
Known sale dates/serials:
ABC / serial 4-226764 / sold March 1963
ABC / serial 4-229884 / sold March 1963
|250000 (Model 1300)
604000-650000 (Model 2000)
|???||1967||March 23, 1967: Tooling sold to Messa in Portugal, who produced many similar models under various labels and shells.||140,142|
Professionally printed, coil bound workshop repair manuals.