Help identify icons

[tevgen]

Inherited from the grandparents of my father's 2 icons. First I understand Lord Vsederzhaschy. Great-grandmother born in 1895. She wore this icon to Jerusalem. Inherited it from her grandmother. It (the icon) dreamed of his father. In the dream, requested that her (icon), my father took to him. Dreamed of lying face down in a table in a great-grandmother Sarah. When he went to her, it was there and found it. Great-grandmother of the Donetsk region.
The second icon looks like a sort Tikhvinskaia Mother of God. If someone will tell for sure - thanks in advance. Stories do not know her, took her father was there in the barn.

Questions.
1. Age. All I know is that not 20 century.
2. Which school.
3. Exact names.
4. Estimated value (collector, market, historical).
5. Why on the icon of the Lord knot in the heart. My father saw a few old icons - there were also swirls it in the heart.

P.S. Salaries were not preserved, but the paint still retained brightness. The fact that nobody restored - a guarantee. Photos on the phone, the quality is low, a couple of days will be better.
Last 2 pictures - the icon of the Mother of God.

 Thanks in advance.