While cataloging wrenches for the next Wrenching News Auction coming up in April I think I found a 12" Coes wrench that is newer than the one pictured. Same wrench style but only marked with Billing's "B" in a triangle logo. It's lot No. 447 on the photo below.
(http://i222.photobucket.com/albums/dd3/buswrench/york-2014/Y13-0440-450-.jpg)