Here is a list I composed using online information and personal observations. The years are approximate. Any substantiated corrections or additions (not just relying on memory or guesses) are welcome.
Note: Tanks were straight suction only until 1959 with the introduction of the power nozzle option.
Key:
* - basic model (manual)
** - standard model (automatic--the term 'deluxe' was used 1968 - c.1984 until power nozzles became standard)
***premium model (automatic w/greater capabilities and standard accessories)
> - hospital line (the only such one Electrolux Corporation ever carried)
^ - indirect sales/show lines (those without a caret were/are only direct sales)
^^ - indirect sales/show lines and direct sales
+ - only around 500 manufactured to commemorate the 25th anniversary of the consecutive use of 1205-style tanks (the earlier LX and LXI also had rectangular bodies); given to branch owners and associates with extremely high overall sales (personally identified with name plaques)
The primary color is listed before the forward slash, and the secondary color/trim is listed after. Tertiary or quaternary colors are not listed.
It seems that the Aerus logo was used on machines prior to 2004 as a replier in another thread had mentioned. I think it may have been at least 2002 going by someone who told me that she'd purchased a Lux 7000 in 2002; and I haven't seen one without the Aerus logo.
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ELECTROLUX CORPORATION (USA) TANK MODELS/NAMES 1924-Present
METAL-BODIED
*V – reddish-brown leatherette: 1924-27
*XI – black-green leatherette: 1927-30
*XII – black or brown leatherette 1930-37
*XIIA – black or brown leatherette: (economy model) 1937-41
*XXX - gray leatherette: 1937-41; 1947-54 - The 25th anniversary was commemorated with a higher 535-watt motor, cord winder, attachment Companion, air-powered floor/furniture polisher, and white brush attachments for walls and delicate furniture although no decal was used to designate an anniversary tank like succeeding anniversaries.
*XX – gray: 1941-42
**LX – teal debossed vinyl: 1952-55
*E – hammertone blue: 1954-56
**LXI – teal debossed vinyl: 1955
**AE – hammertone blue: 1956-57
*T – hammertone blue: 1956-57
*S – blue-gray/ivory: 1957-60
**F - light gray/ivory: 1957-60
*R – light gray/ivory - 1960-63
**G – aquamarine green/teal: 1960-66, tan/brown: 1966-68
**>GH – ivory/teal: 1962-66, ivory/brown: 1966-68
*L – ivory/teal: 1963-66, tan/brown: 1966-68, teal/ivory: 1968-74, gold/ivory: 1974-78
**1205 - teal/ivory: 1968-74
**1205/Golden Jubilee (50th anniversary) - gold/ivory: 1974-75
**1401/Super J - gold/ivory: 1975-78
**1401, 1401B, 1505/Olympia One – brown/ivory: 1978-82
*1453/Deluxe Special Model: - brown/ivory: 1978-82, 2-tone gray: 1982-85, sand/jade: 1984-87, sand/taupe: 1987-88
**1505/Silverado – 2-tone gray: 1982-85
**1521/Diamond Jubilee (60th anniversary) - sand/jade: 1984-87
**1521/Marquise - taupe/sand: 1987-89
**1521/Grand Marquise - sand/navy: 1989-90 (serial letters M_F)
**1521/Legacy - lt. sand/navy - lt. sand/navy: 1990-91 (serial letters M_L)
**1521/Ultralux - lt. sand/navy: 1991-92
**1521/Ultralux LX - navy/lt. sand: 1992-93
**1521/Ultralux Classic - navy/lt. sand: 1993-94
**+1521/Ultralux Commemorative Edition - chrome/black: 1993
PLASTIC-BODIED
**Hi-Tech 2100 - sand/jade: 1985-87, sand/taupe: 1987-89
**^2100/Special Edition – sand/wine: 1987-89 ?
**^2100/Regency Series 2000 – lt. sand/lt. blue: early ‘90s
**2100/Diplomat - sand/navy: 1989-91
**^1515/Regency Series 1500 – lt. sand/lt. blue: 1989-91?
*1623/L-E - sand/jade: 1985-87, sand/taupe: 1987-89
*1623?/Ambassador II - ?: 1989-1991?
*^1623/Special Edition - sand/wine: late ‘80s
*^1623/Regency Series 1000 – lt. sand/lt. blue: early '90s
*^1623/Ambassador- sand/navy: ?
*^1623/Ambassador Plus - sand/navy: ?
*^1623/Model 90 - sand/navy: ?
*^^1625/Advantage Series - brown/sand: c. 1993
*1676/Ambassador III - navy/sand: 1991-94
**1677/Diplomat LX - sand/navy: 1991-92
**1718/Epic 6000 SR - navy/sand: 1992-93
**1762/Epic 6500 SR - navy/lt. sand: 1993-94
*C101A/Ambassador III - navy/sand: 1994-95
*C101G/Ambassador III – gray/coal: 1995-97
*C101H/Ambassador III (75th anniversary) – oyster/fog: 1997-99
*C101J/Ambassador III – white/lt. blue: 1999-01
*C101L/Ambassador III – white/lt. blue: 2001-02
*C101K/Lux 5000 – white/lt. blue: 2002-05
**C102A/Epic 6500 SR – navy/sand: 1994-95
**C102D/Epic 6500 SR – gray/coal: 1995-97
**C102G/Epic 6500 SR (75th anniversary) – oyster/fog: 1997-99
**C102J/Epic 6500 SR – white/lt. blue: 1999-02
**C102K/Lux 7000 - white/lt. blue: 2002-04
***C104A/Renaissance – coal/gray: 1994-95
***C104H/Renaissance – gray/coal: 1995-97
***C133A/Epic 8000 – oyster/fog: 1997-98
***C134A/Guardian (75th anniversary) – oyster/fog: 1998
***C134B/Guardian (75th anniversary) - oyster/fog: 1999
***C134C/Guardian Encore white/lt. blue: 1999-01
***C134D/Lux 9000 – white/turquoise: 2001-02
***C134E/Lux 9000 – white/lt. blue: 2002-03
***C134F/Lux 9000 – white/lt. blue: 2003-04
**^C141A/2100 – gray/black: 1996-97
**^C141B/2100 – gray/black: 1997-98
**^C141C/2100 – gray/black: 1998-99
**^C141D/2100 – gray/black: 1999-00
**^C141E/2100 – gray/black: 2000-01
**^C141F/2100 – gray/black: 2001-02
**^C141G/Lux 5500 – white/lt. blue: 2002-05
*^C151B/Lux 2000 – gray/black: 2001-02
*^C151C/Ultralux 2000 – gray/black: 2002-03
*C151D/Lux Classic – gray/black: 2005-2009
*C151G/Lux Classic - white: 2009-2013
*C151M/Lux Classic (90th anniversary) - black: 2013-
**^C152B/2100 – gray/black: 2001-02
**^C152C/2100 – gray/black: 2002-03
**^C152E/Ultralux (80th anniversary) – sand/navy: 2003-04
**^C152F/ ??
**C153A/Lux 7000 - white/lt. blue: 2004-05
**C153C/Lux Legacy - white/lt. blue: 2005-09
**C153D/Lux Legacy - white/lt. gray: 2009-13
**C153E/Lux Legacy (90th anniversary) - black: 2013-
***C154B/Guardian - white/lt. blue: 2004-2005
***C154E/Lux Guardian - white/lt. blue: 2005-09
***C170A/Lux Guardian Ultra – white/stainless steel: 2009-12
***C177A/Lux Guardian Platinum (90th anniversary) – black/stainless steel: 2013-
I have been unable to identify the tank in the photo below. It looks like a Model C152/2100. Do you know its model and name?
