OK.
I assume that there is no sign of a model number on it rather than simply a serial? Like a B2 QR or something?
( Redsushi! Whoop! Whoop! http://thehittvshow.blogspot.com/, Sun 13 Apr 2008, 10:59, archived)

Thats it
took me ages to notice the "ARCA swiss" logo on it! been searching the internet for those numbers and nothing been coming up!
( SkUG is glad to be out of hospital (stupid lungs), Sun 13 Apr 2008, 11:01, archived)

Thanks again kind sir!
brb later, i'm off to photograph some forts!
( SkUG is glad to be out of hospital (stupid lungs), Sun 13 Apr 2008, 11:02, archived)

No worries.
By the looks of things, it is probably an older model of this www.the-digital-picture.com/Reviews/Arca-Swiss-Monoball-B1-Ballhead-Review.aspx

But I will see what they say.
( Redsushi! Whoop! Whoop! http://thehittvshow.blogspot.com/, Sun 13 Apr 2008, 11:06, archived)