Nice. That looks like pure Sativa budding to me. I just placed a strain called Jack Herer (Mostly Sativa) in the dark. That strain I just grew out, I had the name backwards I know now. Ace seeds developed 2 Malawi crosses with Panama. I grew the "Panama x Malawi" which takes on the Panama plant structure and high yields. My final yield was 28 ounces from 3 plants.
I just harvested a strain called White Skunk, which bloomed out almost exactly like the cross above, with very long running Colas. I was surprised it bloomed that way. It has an Indica dominant stone too. However, the Jack Herer I just put to sleep smells big time of Sativa. Just like the cross above. I recently harvested my first OG Kush plant, which went way over the estimated flowering time. I can confirm, the hype about the strain is real. It is impressive, very potent.
I have seeds from Eva seeds of a Jamaican strain called Jamaican Dream, which supposed to be 100% Sativa and finish in only 47 days flowering.
I have been tempted to get and grow Columbian Gold by Underground Seeds, but, it would tie up my tall tent for about 5 months for just a few ounces. I just wonder if it would be what I remember from the 70's. The Malawi cross reminds me some, but the smell/taste just isn't sweet like that Gold was.
I bet your strain is great. Thanks for posting.