Since my "paperwork" involving Camillus & Camillus made knives only goes back to 1949, I was unable to fully investigate the use of that style of shield and that style of multi tool knife. Maybe they did make a 6 blade/tool knife with that shield, but not after 1949. The 3 links that I posted are all for Camillus, Sword Brand, 4 line tang stamp, multi tool knives.
P.S. That harness jack is beautiful.
Here is a shield that is very close to the style of the shield on the knife in question.
It is on a vintage (pictured) Schrade Walden NY USA #821 whittler pocket pen knife 1953-1954.
The shields on some (not pictured) A.G. Russell knives are also very, very similar.
Look under the Chinese knife forum.