Giannina has been around since 1967 and obtains the International Patent for Industrial Invention, issued by the Ministry of Trade and Industry on the 15th of February 1968 under the number 803823, defines it: "Coffee maker for family use to make espresso coffee, where the handle represents the locking/blocking system of upper and lower parts...".
Giannina coffee makers are 100% made of stainless steel and the inside part is sandblasted. Stainless steel cannot get rust because it is sufficiently reactive to protect itself from further attack by forming a passive corrosion product layer.
During the manufacturing process, each Giannina stove top is polished using a black polishing liquid. Most of the polish is removed and cleaned from the stovetop, however in some cases, polish residue (black) can remain on any part of the unit. This is not a defect. The polish can be easily removed using water and a sponge.
Please see below photos for your review.