It was probably in the thread here that I saw it. However there is a little bit of history of the firm here:

http://www.oldlawnmowerclub.co.uk/moms/mom41-witch.htm

It looks as if that logo is not the only one they used, and their model names traditionally began with W. Here is a really different one:
http://cgi.ebay.co.uk/Webb-cylinder...denPowerTools_CA&hash=item27b255d836

But for real class of course you need a B&S 60102:

http://cgi.ebay.co.uk/Webb-14-inch-...denPowerTools_CA&hash=item4cefb200ba