Printing block Jewish printing house, founded by Uri Phoebus ben Aaron Halevi

In 1692 - the opening of the Jewish printing house, founded by Uri Phoebus ben Aaron Halevi(1625-1715) in Amsterdam and gave impetus to the flourishing of Jewish book printing in Zolkiew(Western Ukraine) in the 18-19 centuries. I found (http://www.danwymanbooks.com) a page where I saw the imprint of ornamentation on the four corners of the page is Printing block, I found not far from Zolkiew.
The imprint of this cliché is on this page
http://www.danwymanbooks.com/spec5.php
http://www.danwymanbooks.com/spec5/heb36-9.jpg
N 45.
At the corners of pages of typos that I found a old Printing block.
Maimonides, Moses. SEFER PE'ER HA-DOR [PER HADOR]. Levov: Avraham Yehoshu'a Heshil Druker, 1859.
I just wanted to know the cost of printing the old Printing block.
I found it far from Zolkiew through a metal detector, dug from the ground.
By the way it's an old Printing block I went to Lublin road, mentioned in the prologue of the Coen brothers, the parable of the film A Serious Man.=)
Whether this is an artifact of a part of Jewish heritage and what is the value of the old printing block?