Imperial
				Imperial Typewriter Co. Ltd. Leicester, England
Models and s/n	Y	M	D	Remarks	Ref.
Standard Manual
Model A
	1908			three row keyboard, rounded	7
Model B
	1915			three row keyboard, rounded	7
Model C
	1915			Aluminium, rounded keyboard	7
Model D
	1919			three row, square keyboard	7
	1932			from 1932 on called Imperial Junior	7
Junior
up to 64500	1928				13
67000	1929				13
over 67000	1930				13
No. 50
75000-76200	1927			To find serial numbers of early machines take off the carriage and look at right-hand lug on top plate.	6,13
76201-80250	1928				6,13
80251-86500	1929			Ball bearing carriages commenced about 85000	6
86501-950010	1930				6
950011-100000	1931				6
100001 to "A" Code	1932			AA to AZ and BA to BJ followed by two figures are equivalent in age to machines serialled 106050 to 109600. This must not be confused with Imperials serialled A or B and followed by four figures.	6,13
Codes B to D	1933				6
Codes E to G	1934			Chromium plating from E Code	6
Codes H to J	1935				6
Codes K to N	1936				6
Codes O to Q	1937				6
Codes R to T	1938				6
Codes U to X	1939				6
Codes Y to Z	1940				6
Codes ZA to ZC	1941				6,13
Code ZD	1942				6,13
Code ZE	1943				6,13
Code ZF	1944				6,13
Code ZG	1945				6,13
Z140000-Z154999	1945				6,13
Z155000-Z168199	1946				6
Z168200-Z174000	1947				6,13
Z174500-Z175100	1948			No typos, some numbers are left out in the listings	6,13
Z175200-Z175600	1949				6,13
Z175700-Z176145	1950				6,13
Z176160-Z176760	1951				6,13
Z176778-Z177300	1952				6,13
Z177301-Z177700	1953				6,13
Z177701-Z177900	1954				6
Z177901-Z177999	1955				6
No. 55
Codes AA0001 to AA1250	1937				6
Codes AA1251 to AA6110	1938				6
Codes AA6111 to AB0499	1939				6
Codes AB0500 to AB3999	1940				6
Codes AC0001 to AC1699	1941				6
Codes AC1700 to AC4000	1942				6
Codes AC4001 to AC4299	1943				6
Codes AC4300 to AC5199	1944				6
Codes AC5200 to 262999	1945				6
263000	1946				6
268000	1947				6
284000	1948				6
305930	1949				6
331003	1950				6
349987	1951				6
361461	1952				6
36400°	1953				6
364801	1954				6
365301	1955				6
365901	1956				6
366001	1957				6
366201	1958				6
366501	1959				6
366650	1960				6
366900 upwards	1961				6
Model 58
287940X	1948				6
306380X	1949				6
331012X	1950				6
351282X	1951				6
361454X	1952				6
364200X	1953				6
364801X	1954				6
365301X	1955				6
365901X	1956				6
366001X	1957				6
366201X	1958				6
366501X	1959				6
366650X to 366900X	1960				6
Model 60
6A00006-6A01100	1949				6
6A01200	1950				6
6A10022	1951				6
6A34371	1952				6
6A64257	1953				6
6A73701	1954				6
6A81801	1955				6
6A85601 t o 6A86500	1956				6
Model 65
6B00000	1952				6
6B02800 to 6B17400	1953				6
6C00000 to 6C11 200	1953				6
6B17401 to 6B21450	1954				6
6C11 201 to 6C30700	1954				6
6C30701 to 6C30750	1955				6
Model 66
6D00000	1954				6
6D10001	1955				6
6D46001	1956				6
6D90001	1957				6
6E30001	1958				6
6E68001	1959				6
6F55001	1961				6
6G06001	1962				6
6G39701	1963				6
6G54000	1964				6
6G 59001	1965				6
6G61301	1966				6
6G62501 t o 6G63226	1967				6
Model 70
7A01000	1962				6
7A07500	1963				6
7A41800	1964				6
7A 80301	1965				6
7B21301	c966				6
7B51501	1967				6
7B89985 to 7B90814	1968				6
Model 80 (Series I)
7F0001	1968				6
7F38741	1969				6
7F83182 to 8F20392	1970				6
Model 80 (Series II)
8F20393	1970				6
8F30940 up	1971				6
8F81686	1972				7
9F25219	1973				8
Electric
Imperial Electric
ELA001	1960				6
ELA501	1961				6
ELB101	1962				6
ELB601	1963				6
ELC501	1964				6
ELE001	1965				6
ELE2001	1966				6
ELF1000 to ELF1090	1967				6
660
8558054	1967				6
8762635	1968				6
9151681	1969				6
9394485	1970				6
9430420 up	1971				6
770/775
9519180	1970				6
9658954 up	1971				6
790/795
9823044	1972				6
1276235	1973				6
Portable
Modell Regent
	1930-1931			keyboard with four rows	7
Good Companion
No. 1
100000 to Code A	1932				7
Codes B & C	1932				6
Codes D to I	1933				6
Codes J to R	1934				6
Codes S to AD	1935				6
Codes AE to AR	1936				6
Codes AS to BJ	1937				6
Codes BK to CE	1938				6
Codes CF to CZ	1939				6
DA001	1940				6
DQ700	1941				6
ED200	1942				6
EL800	1943				6
EY000	1944				6
FF700	1945				6
FO700	1946				6
FU001	1947				6
GC000	1948				6
GL000	1949				6
GV000	1950				6
HF000	1951				6
HP000	1952				6
IB000	1953				6
IN000	1954				6
1Z000	1955				6
JM000	1956				6
JY000 to JY999	1957				6
No. 2
Codes 2A	1938			Tabulator Model	6
Codes 2B to 2I269	1939				6
2J270	1940				6
2Q500	1941				6
2V900	1942				6
22300	1943				6
2AB100	1944				6
2AD700	1945				6
2FO800	1946				6
2FU800	1947				6
2GC000	1948				6
2G L000	1949				6
2GV000	1950				6
2HF000	1951				6
2HP000	1952				6
2IB000	1953				6
21N000	1954				6
21Z000	1955				6
2JM000 to 2JX999	1956				6
Model No. 3
3A000	1951				6
3A401	1952				6
3B701	1953				6
3D401	1954				6
3H801	1955				6
3P000	1956				6
3Y000 to 3Y999	1957				6
Model No. 4
4A000	1957				6
4J000	1958				6
4X001	1959				6
4AQ001	1960				6
4BP001 to 4CE030	1961				6
Model No. 5
5A000	1957				6
5E000	1958				6
5N000	1959				6
5AC001	1960				6
5AJ001 upwards	1961				6
Model No. 6
6C690	1961			Model No. 6T: Same serials as Model No. 6 with "T" added to serial numbers.	6
6Q361	1962				6
6AM401	1963				6
6BC001	1964				6
6BN501	1965				6
6BP801 to 6BP999	1966				6
Model No. 7
7A720	1961				6
7H281	1962				6
7S301	1963				6
7AA001	1964				6
7AE601	1965				6
7AF901 to 7AG250	1966				6
Concorde
8029600	1965				6
8050001	1966				6
8080351	1967				6
809869 up	1968				6
Messenger
8A001	1964			Messenger (Tab.) Same serials as Messenger with "T" added.	6
8J848	1965				6
8AG401	1966				6
8AP000 to 8AP1000	1967				6
Safari
8894787	1971				6
8935073	1972				6
8942201	1973				6
Model 200
up to 1050498	1969				6
1050499	1970				6
1328174	1971				6
2148617	1972				6
2595230	1973				6
Model 220
up to 8712165	1969				6
8712166 to 8838490	1970				6
1341920	1971				6
2204119	1972				6
2660029	1973				6
Signet
up to 1339103	1970				6
1338103	1971				6
2131052	1972				6
Model 300
1105140 to 1106039	1970				6
8854489 to 8944682	1970				6
1502084	1971-1972				6
2519681	1973				6
Fleetwood
2249093	1972				6
2558046	1973				6