Congratulations on acquiring your Model 1521!
Here is a list of that particular model according to production years, names, colors, and matching colored power nozzles:
1984-87: Diamond J in sand & jade (for Electrolux Corp's 60th Jubilee); paired with PN-5 (sand, jade) and PN-6 (jade, sand)
1987-88: Marquise in taupe & sand; paired with PN-6A (sand, taupe)
1988-89 Grand Marquise in lt. sand & navy; paired with PN-7 (lt. sand, navy)
1989-90: Legacy in lt. sand & navy; paired with pn 1622 (lt. sand, navy)
1990-91: Ultralux in lt. sand & navy; paired with pn 1622 (lt. sand, navy)
1991-92: *Ultralux LX in lt. sand & navy with chrome top, paired with pn 1692 (lt. sand, navy)
1992-94: Ultralux Classic in navy & lt. with chrome top sand, paired with pn 1693 (navy, lt. sand)
1994: Ultralux CE (Commemorative Edition) in black & chrome paired with pn 1693 (black)--commemorating the 25th consecutive year of the rectangular-style metal-bodied cleaners beginning with the Model 1205--an award with a personalized nameplate for exceptional sales performers and branch owners.
*Interesting side note: The LX suffix is the abbreviation for 'lux', the SI unit of illuminance and luminous emittance. That is likely where Lux International, one of the original founders of Electro-Lux, took its name. The company began in 1901 selling "Lux lamps". The original Electro-lux logo even included rays of light. It would have been awesome if one of the trademarks of all Electrolux cleaners would have been lighted tanks or power nozzles; though I'm sure that would have been cost prohibitive back in the day for most Europeans and North Americans. Anyway, the LX suffix denoted the new lighted power nozzle. Other cleaners that year also carried the LX suffix ... Model 1677/Diplomat LX, Model 1685/Genesis LX, and Model 1717/Genesis LXe (with electric hose).
I did want to mention that sometimes different power nozzles than those paired at the factory (as listed above) were either originally or later paired with the machines for different reasons, so their identification is only a guideline. Electrolux's original L-shaped models--PN-5, PN-6, and PN-7--were labeled "Automatic Omni-Flos" and manufactured from 1984-1989. The descriptor meant that the base plate contained extra grooves for air passages which would automatically collect contaminants on its own rather than relying so heavily on your position of the nozzle. Besides colors there were some differences among them such as the spring-loaded wheels on the PN-5, the brush strip on the PN-6, and the fixed cord on the PN-7. The 4-digit model pns were essentially the same but had updated hoods. For the last 20 years or so pn model designations have been alphanumeric beginning with an 'N' for nozzle. Since that time the basic models of tanks and uprights--along with commercial cleaners--have had unilluminated nozzles.
Getting back to your query, as you can see by the list your cleaner is either a Grand Marquise or a Legacy. The other cleaners with that color combination (the Ultralux Classic had a reverse color scheme) had name labels or colors to easily tell them apart. The only way to find out the name of your cleaner would be to look for the serial code which is located on the stabilizer. It has two letter affixes with 5 digits in between. Most of the Grand Marquises had M_F affixes and most of the Legacys had M_L affixes. If yours is different you can contact Aerus's corporate office which should be able to retrieve the name from its database using your serial code.
Regarding the two clips for the attachments--on most tanks there is only one for the combination dusting brush/upholstery tool. Earlier models such as the Model XXX and Model LX with "Companion" caddies as well as later models such as the Epic Series and Guardians had storage provisions for the narrow space cleaners (Electrolux's term for crevice tools) and other tools. To my knowledge the Model 1521s only had the one clip.
This is probably more information than what you'd bargained for, but I hope it was helpful and interesting. Best wishes.
