In the late 1950's Intertype UK developed a new Dual Duty Quadder, to replace the old quadder. The last Intertypes sold in the USA were made in England, but Star Parts quadders were installed for use in America. Intertypes shipped all machines to the rest of the world were with the new quadder. We are currently trying to get an English C4 with the new quadder running, but we have no documentation. Intertype produce an eight page service pamphlet on the Dual Duty Quadder.
If anyone has a copy of the document and could scan it as JPG files and post it on Metal Type it would be appreciated.