mobile

Could use a little help with my HTC One M7. Bought it 2nd hand online a few months back, and it came pre-flashed with InsertCoin.
Buuut, updating has become a bit of a hassle for me, especially having to manually update. I'm looking to flash the stock ROM get the OTA up and running again.
I saw the other threads and followed the instructions so I have S-OFF, and I've already removed the "TAMPERED" and "UNLOCKED" from the bootloader. I came across a pretty big hiccup along the way, though.
For some reason, the OS on my bootloader screen is blank. I've tried getting version using ADB, but the version_main is still blank. Here's what I got from ADB:

So, I've been wondering which RUU I'm supposed to use, because, most of the other posts I've read need me to match my version_main, my radio, CIDnumber, carrier and modelID. Not knowing my version/OS, what RUU should I use?
Note: My phone isn't locked to a carrier. I live outside of the US, (in Asia) but I'm unsure if I'm using the unlocked EU version or the International version.

Thanks in advanced,
-Q