Prices and investments in paintings by old masters

[sergejnowo]

Сообщение от VYACHESLAV

The fashion for such a painting was from the end 19 to the First World. Nouveaux riches adorned her his apartment. They wrote a number of shops and two post-war. This explains the fairly large selection today.
Confirm or refute the time of writing should be examination of paints and canvas. If she certainly is in custody professor.

question is not for the examination of paints and the canvas - is a technical matter.
The question is about the fashion for such things in time.
Ie this is the starting point in question to invest or not. I would like to view in this direction.