Help identify icons

[Pecheneg]

Questions.
1. Age. All I know is that not 20 century.

"Lord Almighty" - podokladnitsa. beginning of 20 century
Bulk product of its time
"Our Lady of Tikhvin" - kon.19 - Beginning of the .20 in.

2. Which school.
No ... Artel'nykh consumer goods

3. Exact names.
"Lord Almighty," "The Virgin of Tikhvin.

4. Estimated value (collector, market, historical).
Collector value - no. Market - .....?
 Historical - no ... except if it is your way as the memory of the past ...