Madonnina

[Крапива]

Good evening!
There is a picture, inherited, original lithograph ( according to mom) paintings Roberto Ferruci. There is a signature. Over 70 years in our family.
In his time ( about 80 years) was estimated by the expert from the Tretyakov gallery is quite expensive. Turning now to one of the online examinations appreciated extremely low. At the level of the poster.
Question to the experienced professionals forum - whether to bother with further examinations?