I don't have a special thing for 4-inch wrenches, but here are three Buffalo beauties made in the day when Buffalo, NY was an industrial powerhouse.
They are beautiful. I collect the more modern version of the 4"ers.
The second one , the straight Bergman O' Buffalo is the kind I have been searching for. I have a full set of the curved ones in a shadow box, and they made a full set of straight ones also, but I haven't found any yet.