Brother
Models and s/n	Y	M	D	Remarks	Ref.
Poratbles
Model 700
A4-L4	1964			Brother serials indicate month and year: A=January; B=February; 4=1964; 5=1965 etc.	6
A5-L5	1965				6
A6-L6	1964				6
A7-L7	1967				6
A8-L8	1968				6
A9-L9	1969				6
A0-L0	1970				6
A1-L1	1971				6
A2-L2	1972				6
A3-L3	1973				6
Model 1200
A4-L4	1964			Brother serials indicate month and year: A=January; B=February; 4=1964; 5=1965 etc.	6
A5-L5	1965				6
A6-L6	1966				6
A7-L7	1967				6
A8-L8	1968				6
A9-L9	1969				6
A0-L0	1970				6
A1-L1	1971				6
A2-L2	1972				6
A3-L3	1973				6
Model 1500
A4-L4	1964			Brother serials indicate month and year: A=January; B=February; 4=1964; 5=1965 etc.	6
A5-L5	1965				6
A6-L6	1966				6
A7-L7	1967				6
A8-L8	1968				6
A9-L9	1969				6
A0-L0	1970				6
A1-L1	1971				6
A2-L2	1972				6
A3-L3	1973				6
Model 2000
A4-L4	1964			Brother serials indicate month and year: A=January; B=February; 4=1964; 5=1965 etc.	6
A5-L5	1965				6
A6-L6	1966				6
A7-L7	1967				6
A8-L8	1968				6
A9-L9	1969				6
A0-L0	1970				6
A1-L1	1971				6
A2-L2	1972				6
A3-L3	1973				6