It has been a while since I've seen one, but I have to agree with bear here. The configuration of that board looks identical to the Video Spigot that I used to own.
Were there even dedicated composite out cards for the Mac? I don't really see much of a point to them. The video quality would suck for regular use, anything for video production really ought to have a better quality output anyways, I doubt that cost would be much of a factor that would make composite only more desirable than component since it is probably in component form before it gets converted into a composite signal. Oh, and many of the regular SuperMac video cards output to NTSC anyways.
Were there even dedicated composite out cards for the Mac? I don't really see much of a point to them. The video quality would suck for regular use, anything for video production really ought to have a better quality output anyways, I doubt that cost would be much of a factor that would make composite only more desirable than component since it is probably in component form before it gets converted into a composite signal. Oh, and many of the regular SuperMac video cards output to NTSC anyways.