Guys, I found something!
Sorry If I know few on this subject, but today I am just randomly browsing around in a forum (Kaskus, if you wanna know, and FYI it is quite a popular forum in Indonesia), and I found this thread
(sorry it's in Indonesian, I can't help a lot on that).
It talks about the history of publication of Tintin albums in Indonesia, and interestingly enough, it mentions PT Tiga Lima Djakarta! It mentions it like this :
Serial ini di Indonesia diterbitkan oleh tiga penerbit yang berbeda. Pertama kali diterbitkan oleh penerbit P.T. 35 Djakarta, yang kemudian disusul oleh penerbit Indira dan sekarang di tahun 2008 oleh P.T. Gramedia Pustaka Utama.
(Translation : This serial was published by three different publishers in Indonesia. First it was published by P.T. 35 Djakarta publisher, which is later followed by Indira publisher and today in 2008 by P.T. Gramedia Pustaka Utama.)
The thread was posted in 15 August 2011, which means, it is still quite new (it's quite new, right?). If only I knew more about the poster's user identity, or how he knew about PT Tiga Lima Djakarta, then it could mean that this user, even if he might not join this forum (or even the Tintin Id mailing list), KNOWS about PT Tiga Lima Djakarta, which means that this publishing house ever existed, even if the track records (such as archive about this publishing house) are nonexistent.
Does anybody might have known this user?(especially Indonesians, please)
If one of you know, do you know whether if he join a forum or mailing list like this? (a place to talk about Tintin for tintinologists and tintinophiles alike).
Anyway, I don't mean to encourage stalking this user (as I write previous questions). I just wonder, that if we could know something about this user, it might be somehow helpful in this investigation. (Besides, if we know about this user, we can make sure that other people, aside from those who joined Tintin Id, ever known about this publisher.)