Looks great, Keith! You were fortunate to get the color-matching Rug Washer with it, too. That's not common.
Its hose suggests that it was made from 1971 to 1975 (unless it's a replacement). Going by the users manuals, the first iteration of teal blue Model Ls, 1968 to 1969, had the gooseneck-grip standard hose with or without the pigtail cord; the second iteration, 1969 to 1971, had a pistol-grip standard hose or power hose with electrical coupling. The third iteration, 1971 to 1975, had the gooseneck-grip standard hose or power hose with pigtail end, like yours.
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Btw, the 1969 to 1971 power hose with the electrical coupling was reintroduced with a revised pistol-grip in late 1975. From that time to 1982 four hoses with pistol-grips were offered: the power hose with electrical coupling for the 1205 or 1401; the power hose with pigtail end for the Model L; the standard hose for any cleaner, and the standard vinyl hose with 3-wire cord for the Model CB.
I've never seen a standard hose in the gray colors (Silverado-era) or the later braided hoses of different colors, so I'm thinking that from 1982 to 1993 these braided hoses were available: the pistol-grip power hose with electrical coupling, the standard vinyl with 3-wire cord and metal coupling for the Models CB & CB2000, beginning in 1986 the standard vinyl hose with plastic coupling for the L-shaped uprights, and beginning around 1987 the uprights' standard vinyl hose with plastic coupling & pigtail cord for the Sidekick (adapter for cord plug-in to cleaner needed until 1991). I'm unsure what type(s) the central vacs have used, but Electrolux Corp. introduced them in 1986.
1993 marked the retirement of the braided hoses and the introduction of the PVC (polyvinyl chloride) hoses (or was that earlier with the central vacs?). The pistol grip continued being used with the budget models, CB2000, and uprights; the gas pump-grip with on/off switch was introduced with the Epic 6500SR, model 1762; and the gas pump-grip with push button electronic suction and on/off controls was used with the Renaissance, model C104A from 1994 to 1995. The handle controls were revised with the Renaissance C104H in 1995, and a suction slider control replaced the style with push buttons on the Epic 8000's in 1997. The Model CB2000's standard hose with the 3-wire cord was retired in 1999 along with the cleaner. I don't know about all the changes since 1999. Note: If you're trying to get original-matching white PVC hoses with all-white grips, look for the colored line tracer in the hoses.
Sorry for digressing, but I got on a roll and hope it will help you as you build your vac collection. One more thing, you can use a Sidekick with your Model L's hose; just get a 6" pigtail cord. Also, you can contact Aerus to request users manuals for the Model L and Rug Washer. In case you didn't know the Model L was manufactured in these color schemes: ivory w/teal green trim--1963 to 1966; tan w/ivory trim--1966 to 1968; teal blue & ivory trim--1968 to 1975; and honey gold w/ivory trim--1975 to 1979; and the Rug Washer accessory was available from 1962 to 1987 in several color schemes that matched the vacuum cleaners sold during each period. Have fun using your new acquisitions.