Newbie question: lenses

Hi. I'm brand new to LF, and just bought my first camera and lens. I have a
question about the lens, a Schneider Angulon 90mm f/6.8. I know it's old;
the serial number is is mid 5 million, making it a two years my senior. The
trouble is, I can't seem to find any information about it on the web. What I
did find conflicted with everything else. I'm looking for just the angle of
coverage and coverage at infinity focus. It was mere curiosity before; now
that I have it in my hands, I'm concerned. I have loupes with more glass
than this lens has; it's not at all what I was expecting. Is this reasonable
for a 4x5 wide angle lens? Will I get reasonable coverage and movement on
4x5? The camera hasn't arrived yet, so I'll have to wait a few more days to
find out. In the meantime, you can help drive me crazy with more rumors and
suppositions. What can you tell me about this lens I bought?

Thanks.
Mike.