If I was looking for what was being sold in the 1970s as AG, I would instead chase South American Landrace strains and maybe hybridize them. Depends on why you are after the strain...taste, novelty or head high. Growing the real LR sativas rarely turns out well indoors, IMHO.
I have purchased several Himalayan LR strains from these guys and they are legit. They currently offer (12) strains from the Central & South America. Have a look at the pics of what a real LR Columbian Punto Rojo looks like...bushy foxtail flower structures and very long slender leaves.
Region: South America Genetics: Pure Colombian Landrace Latitude: 2° N Regional Harvest: End of October Region: Tierra Adentro (South of Huila Colombia) Seeds: Regular Height: 2 to 3 meters in optimal conditions (natural outdoor environment in Colombia) Yield: 500gr. of dried flowers in natural...
www.tltseeds.com
As the OP noted: Veg=16-20weeks; Flower=12-16weeks.
I would LOVE to hear if someone knows where a real Black Oaxacan LR can be found. Never found one.