That's also one thing that makes me uncertain. The end caps don't have the GT logo, but the GT All Terra also has a completely round top tube and [round tubes]. In fact, it's more like the All Terra than the Zaskar.I suspect that if it was produced by GT, it might have been manufactured in the same factory but then abandoned due to unsatisfactory weight or craftsmanship. Later, GT might have had other brands OEM their titanium frames.
All Terra ?
That end cap isn’t GT in shape. Looking at the pics it does however look smaller welds than a Zaskar. But not neat like a Ti GT.
Xizang was the Ti frame that ran from 90 -90. But is so vastly different in every way. These were made by various Ti places throughout the years.
Lightning is 97/98 but again vastly different. Made in Taiwan.
I think someone has had a Zaskar copied out of Ti as they couldn’t afford a Xizang in 94/95