Switchable Diamond ballast missing switch lables?

Just got a used 1000w Diamond switchable ballast but the lables that indicate switch position are missing !!! Cant find diamond website or picture of ballast showing the decals near the switch!! Help Please!!!!!!

That's a bummer. You could buy two identical cheapo bulbs ($40? each), and see which position burns out the light first, or if you have a light meter, which possition produces more light. I would probably call/email the company, tell them the model, and ask which is which.