Thank you Stefan,
I restored Sonia a year ago and it was a very good introduction in the world of commercial espresso machines as in the world of lever groups. Being a huge machine with lots of room inside, wide and heavy tubing and no(!) electric or electronic features beside the heating elements it is a clearly understandable mechanical concept that cannot have changed much since it was invented in 1948. But the rectangular form has its advantages: You don't pay as much for machines of this kind as for the Faema President, Mercurio or the Gaggia Classica or America - and there is no problem at all with parts, as the group ist still in production and used in actual C.M.A models as the Rapallo aL.
I just completed changing the tube in which the piston is travelling - it was worn out after 35 years of use, 30 of them commercial. When I got the machine, it wasn't working at all, spring corroded and broken, seals down and heating element missing - but you could get every single part in no time directly from Astoria.
So it is not only a possibility to get a machine near the material price (copper is quite expensive these days) but also a chance to get to know your baby from the bottom of the frame to the last seal inside the steam valve.


Since then it is a continuous source of joy to watch the coffee pour in the cup - especially since I am using the bottomless ...
Cheers Emil