There are quite a lot of bell wrenches, looking through the documentation, but many of them were specialized for CO work, probably not made in the kind of quantity the field tools like screwdrivers were made in. There are probably 2 dozen wrenches shown, as many screwdrivers...
I can not find a matching entry for 590, 590A is a totally different, special tool...
could be a slightly misnumbered WECo tool I suppose....(don't have a weco list)