noun
permanent preservation edition; collector's edition; version worth keeping forever
Used for books, media, or products marketed as timeless or essential enough to keep permanently. Often carries a nuance of special quality or completeness.
この映画の永久保存版DVDが発売された。
A permanent preservation edition DVD of this movie has been released.
彼はその漫画の永久保存版を全巻集めている。
He is collecting all volumes of the permanent preservation edition of that manga.
Compound of 永久 (eternity), 保存 (preservation), and 版 (edition). A straightforward modern compound with no obscure historical derivation.