Painting on paper self-portrait Pierre Jérôme

Painting, thick paint (the nature of which I do not know) worked in wash, signed Jérôme (Pierre Jérôme) it is most likely a self-portrait. Small insects, light traces of humidity on the mat but not on the work, dirt on the glass (inside). Original frame. 53.3/43.3 cm Artist side, present in many prestigious collections, Rome Prize.