A Singer Merritt 2112? I've just aquired a Singer Merritt 2112. I'm looking to find...

I've just aquired a Singer Merritt 2112. I'm looking to find a manual of some mode for free, online. If you have any info oon this particular apparatus i would greatly appriciate it. I am a beginner and i'm looking to "get this one" beforehand i actually buy one. I've figured out how to thread the top..the bobbin? is already done down on the bottom... in a minute what?

PS. i know its like 20 years+ but its dependable from what i've been told.
Help please?
Answers:    Try this site. It's not the complete instruction manual, but it tells you how to thread everything.