Ajahn Pleang Boon Yeun
This is the 2nd time Ajahn made Khun Paen Seryob Marn after a 13years period.
2543 would mean it contains Prai 59.
Special Edition as in the real gold paint was smeared on as Special Nà Nà Thong blessings for close devotees or family.
The 2543 SYM is just as hard to get as the 2530 and this being a Special piece, is much much harder now.
Seryob Marn is to defeat Maya or Marn in Thai following the story of Lord Buddha is HIS Final Perfect Attainment. To laymen like us, it just means to assist us in clearing obstacles ahead in life.