hi Mike ;-)
They are some 500ish I guess.
The older one says 440, the newer one 520.
I might think this is a hooey, the motors and the pulleys are identical.
Here's a timeline:
- 1958 first Lavamat (boltdown system, no suspension)
(had internal boilers in addition to internal heaters, require 3phase 400V)
(models A, B, C, D, 64, noris and deluxe) spin 350 rpm
- 1964 "free-standing" suspension was introduced and sales shot up,
230V regular plug
(my machines here) spin 440 to 520
- 1970s beginning of "kitchen-ready" machines with detachable top and having front dispenser drawer. "bio" heating (slower and longer for enzyme detergents)
different spin speeds from 420 to 750 (according to model)
(now also sold as "Rondoroyal", "BBC", "interfunk", "Vorwerk" = relabeled)
- 1977-79 brownish or silverish front panels in "softline" design (=rounded edges, hello ABBA and shag carpets.)
introducing "variomatic" spin (several spin bursts with intermittent tumbling. exchangeable outer door decoration panels for kitchen integration. (spin speeds 700 to 850)
also the first solid-state electronic PCB machines. (these introduced the carbon brush motors: 1000, 1200 rpm)
- about mid80s: no longer double door, just a plain port hole. begin of the ÖKO series. carbon brush motors only, speeds 1000 to 1400
- 90s till today: AEG-Electrolux machines with red LEDs, 1000 to 1800 (according to model)
And the link is especially for you ;-)
Cheers
Joe