2 of my favorite batches of Luang Phor Ngern is 2528 Roon Bpeun Tek and 2534 Roon Fah Kham Ron.
Fah Kham Ron uses the material of 2528 Bpeun Tek which consists much of Phor Ngern's actual material and amulets.
These 2 batches contains many miraculous happenings even just during the consecration ceremony.
2534 Fah Kham Ron, during the beginning of the ceremony in Wat Ban Klang, the skies turns dark and covered by dark clouds. And witnessed by thousands that attended, a bolt of lightning struck the ceremony ground so hard and loud, it shook the area as if an earthquake just occurred. It was believe that the heavens and Phor Ngern gave the "Greenlight" and permission to this auspicious ceremony.
In another incident, after a devotee had gotten a Fah Kham Ron piece, he inserted into a fish and tried to chop the fish in 2 but can't. He increase the force and tried a 2nd time, same results. So a maximum force was used for a 3rd try & the amulet, due to the force used, jumped out of the fish mouth and it still remained intact. Therefore, 2534 batch has another name, "Roon Fun Pla", Fun Pla means chopping of fish.
This is the more popular "Smiling Face" mould (Phim Nà Yim)