You can buy watch magazines at Fully Booked. These are Watch Time & International Watch. And there's Wristwatch Annual and Watches International. These are like catalogs that feature almost every brand and their more popular models. They don't come cheap though.

The magazines sell for about P500 and the catalogs for P2000+. Ouch!
Get the locally published magazine, Calibre. It's just P250.
I'm so obsessed to the point that I even buy the WOW (World of Watches) sold in Singapore. It's actually very cheap at just S$6 or just P180 considering it's very, very thick!
For free brochures from manufacturers, simply log on to their websites. Contact them and simply ask for a brochure.

It takes a long time to arrive in your mail that you actually forget you requested for them!
Glasshute is a manufacture, just like Lange. So is Nomos!

Sinn, Stowa and Tutima all use ETA bases.