6 original gouache painting on vintage paper, A4

"forms". Set of 6 original abstract gouache painting. Six contemporary minimalist black objects. Perfect gallery wall art collection. Each work dimensions: a4 paper format (8.3 X 11.7 inches / 21cm X 29 cm) collectible piece of art. Original graphic art. Abstract geometric form in black color. The color of the paper is naturally toned from white to beige. The age of this paper is around 40 years old. The paper is quite thin so it's necessary to handle with extra care. Great living room decor / office space decor, housewarming gift. The work has the signature and stamp of the author. Sold unframed.