So if you make a little more effort and money ... namely: find out why lubricated date and the lower part of the letters of the surname, is it the painting is homogeneous with respect to time including podpis.Dlya that we should see in the ultraviolet (try currency detector). Ascription - dark pyatna.Podpis of writing coincides with NI Kravchenko. . Check availability cracelures-cobweb of cracks pictorial layer, appear to show vremenem.I course to art in thin. Museum, and the let he says, and you poslushayte.Podramnik certainly not native, not professionally stretched canvas - must win. Are making a portrait of a dignified frame (here is not spare money) suitable for the beginning of last century, and .... Let those who want to prove that this is not NI Kravchenko.

And who wants that? And why did he have to prove that it is not Kravchenko?
A good frame, of course, is needed, it is always the place

If you want to sell, then it is they will have to "prove" authorship.

These sales are not yet, but thanks for the comment.

There. On the dark canvases are caught "fuckers". And cracelures too.

I represent - is itself a sort of "expert" putting his finger in the zeal ... nose and gundosit.I canvas wrong and craquelure fingernail scratches, zakorlyuchka-why are not there and do what is in his hands when the watch snizu.Da and provenance - a sacred cause, without it, nothing at all worth it. "And at the very crumpled twenty in sweaty little hands and wants to azh legs suchit.

The American, or what?
"Twenty" - the dollar after all, bill? And why should he do it?

What does this have to be conditions-vacuum packaging in a supermarket)? Well, if honest, say bought a first-hand, no suckers do not catch is not the price, and the white canvas, and prove that it is more than 100? Sorry that is not on the topic: shy:

If the canvas doubled, then it may well be light at the back if the restorer took for a new canvas. There are pictures with duplicate canvases, and that more than 100 years.
In this painting - a painting stretcher date does not match, it is newer. Yes, and canvas like duplicate, hard to see on the photo, but it might be.

After asking a question, you showed a piece of the picture discussed and looked at him a part of the edge of the canvas and a little bit without paint.
But most likely it is visible light soil. Apparently, the artist has used a primed canvas, the factory primer. In this case, the soil could not darken over time.
You're not talking about the color of the back side asking, according to the fragment shown you?