6v headlight help

I am currently working on my first SR and found a great looking headlight assembly at my local junkyard. It is VERY similar to the headlamp that Vanem sells which holds a small speedo inside it. The only brand identifier on it is on the small plastic disc that fills the speedo hole when not using a speedo there. The plate says CEV on it. On top of the bucket are two small lenses, one red and one green, which are lit up by festoon bulbs. Inside the bucket there is a board with wiring leads. They read SP, 56, T-, L+, 51, B+, 61, FT at the connectors.

Now the issue I am having is trying to wire this thing up without destoying it. It is a 6v sealed lamp system and I know that the SR is 12v. I know very very little about how wiring works. Here are my questions:

1.Is there a halogen kit for this size headlamp so I can run a 12v halogen in it? Interior diameter of the lense is 130mm. Exterior diameter of the lense is about 150mm.

2.Can i put 12v festoon bulbs in it to replace the 6v festoon bulbs in it now?

3.Anyone know what this came off of?

4.What would happen if I hooked it up to a 12v system?

Any help would be appreciated. I know someone out there can shed some light on this for me.

Thanks in advance
Aaron