Need help identifying my Orange amp

[kvaks]

I recently inherited an old Orange amp. It looks and sounds awesome, but I don't know much about it. It has two 12" speakers and I've been told it delivers 100W. I think it's probably from the 1970s. The serial number is 4488.

If anyone can help me identify the year and model, and perhaps some estimate of what it's worth (not that I'm planning on selling it), I'd be very grateful.

Here are some pictures:

[Sooner]

Looks like one of these to me:

http://users.telenet.be/orangefg/OFG_OR80C.htm" onclick="window.open(this.href);return false;

[bclaire]

Model should be written on the back near the output jacks...

[Rally Car]

Looks like an early 70's OR80 combo amp. The speakers dont look original which effects the amps value.... The combo's dont usually fetch any more than the heads....As they weigh so much! Lately the 70's or80 heads are fetching around $1200-1500

Nice amp!