Hello! To my knowledge, there are no particular eports on older Vorwerks. However they were made very well, the materials used were excellent and the reason that so many of them, especially vk 117 and later models are still regularly used in many homes, second or third homes as well, after being replaced by a newer model for daily cleaning of the main house. Vorwerks were very simple machines, a direct air motor witha 250 watts motor, a suction connection for vacuuming attachmets, a blowing port for the bag assembly or for the attachments used with blowing like sprayer, deodorizer, hairdrier or blower and a place for the upright or portable handle, plus on rear sockets for shoulder straps for portable use. Kobolds did the everyday jobs nicey and effeciently, thanks to the simpleness and quality of their bare floor nozzles and the power nozzles. In practice most of the people just used them for these purposes, cleaning floors and rugs and they were unbeatable. Plenty of airflow, fan very close to the nozzle etc. There were many tools as you see for above the floor cleaning and they worked nicely as well, I think many people used the hose with curved and straight wands and floor nozzle or rug tool just to go under low furniture or to reach tight places. Moreover the huge presence on italian territory of Vorwerk dealers and assistance, and the availability of spare parts made them so popular and beloved by the households.
In the last 15 years many improvements to the system have been done and today the Vorwerk Kobold system is still one of the best and most complete cleaning sistems for household use.
I have a wide experience with vorwerks but my collection is very large, I'm not just a Vorwerk freak! I think it is ok for my house and many other people like it.
Kindest regards.
Tommy