I believe that badge is called an "insignia of approval" and its purpose was for FWC to certify that they built the camper in compliance with Colorado's standards for recreational vehicles. It also provides a way to look up the documentation of the plans and approval at the Colorado Division of Housing's office. That of course was back when FWC campers were built in Colorado.
Unfortunately, I've not been able to find any detail on how the process worked to answer the question of when the camper was actually built. If you just look at the insignia, it appears that date could be the date of filing or approval of FWC's plan with the Division of Housing. But I'm guessing it's the build date. It makes more sense to me that FWC would add the serial number, build-date, and plan approval number for an individual camper to an insignia plate.
The check marks have to do with identifying whether the unit is equipped with plumbing, heating, electrical, and fire safety systems.
It would be interesting to compare the numbers on multiple insignias, i.e., on multiple campers of the same era.
If anyone has more info on the insignia or how this process worked, please reply (or PM me)!
