Bit of info...
The cleaners pictured in the brochure are the original line-up from 1986 - the 41, 42 and 43 uprights. All of these featured a 600w motor and had the clear smoked plastic tool cover. These are pretty rare these days.
By 1988, the 41N. 42N and 43N had replaced the original line up. The smoked plastic tool cover was replaced (they were always a weak point - prone to falling open in use and cracking) by a solid cover and the motor was upgraded to 650w.
This line up ran for a few years with some very minor cosmetic changes, but all with the same model number. The majority of these changes were simply the letting used on the cleaners or the inclusion of an extension hose.
In 1992, the MC-E44, 45 and 46 was launched alongside the larger, more powerful 50 series (53, 54 and 55). These style cleaners featured a 700w motor and both the 45 and 46 came with an extension hose (you had to buy it separately with the 44). The 45 and 46 were discontinued in 93 and replaced with a single cleaner - the 47 - which ran alongside the 44. Somewhere along the line, the top end 50 series MC-E55 was also discontinued, so the line up of 44, 47, 53 and 54 ran from 93-95.
In late 95, the newly designed 400 series was launched alongside the 500 series (which was, at the time, just a 50 series cleaner with a longer hose and slightly more powerful motor, though it was eventually completely redesigned, as per the 400 series).
