Hangsen is good in that category. I think their RY4 (my fav), Desert Ship & Virginia amongst others are spot on
in terms of oldschoolness. Although i normally don't vape that stuff anymore, once in a while i get myself a bottle of RY4 or Desert Ship to scratch that itch. I still think it's tasty.
Dekang should be another solid bet, but it's been a couple years since i had some, so can't vouch for them with a recent experience.
Liqua tobacco juices are also decent with regard to what you have in mind. But try
Hangsen first imho.
I was about to say the exact same thing. Most flavors in the beginning were either Hangsen or Dekang. RY4 stands for Ruyan-4.. Ruyan was the first Ecig released, and flavors 1-4 were their different styles. In general, It started from 1 being the least sweet, to 4 being the most sweet.... Ry4 took off like a rocket, and is still a staple flavor IMO.
Once other companies came into play, you started to get the other flavors. Then they went to candy flavorings that didn't have alchohol or sugars to gunk up coils.
So, if you're trying to find the first tobacco companies, I'd try some of Hangsens or Dekang.. Shortly after that, I'd suggest Johnson Creek which made the flavorings for Blu Ecigs.