Those fonts look identical to a couple of old CST tubes I have -- same use of serif and sans serif, italics, etc. But with the CST logo rather than Continental. And these tubes have shorter brass colored stems. Maybe Continental licenses another manufacturer to make some tubes.

I just opened a box for a Continental Race Light tube. Totally different fonts and logo. Made in Taiwan. Black cap on the valve stem.

I have several Continental tires. Country manufacturers range from Germany to Indonesia to Taiwan to China. Conti seems to still make their top shelf tires in Germany.