the tube welds look like machine welds, they are so consistent. only when you look at the gusset welds do they start to look hand done as they are a straight run and the tail is a bit hot. You can even see the start and overlap of the finish on the head to top tube, almost perfect puddle overlap of a few mm but not complete.
beautiful bit of work by a very competent welder who isn't trying to "stack dimes".
I am not sure the French manufacturer Emery has been mentioned in this thread.
They had a pretty special Ti frame in 93 I believe that was made in Taiwan and was 6Al-4V tubes throughout. That's pretty exceptional as 6Al-4V is much more difficult to work with than 3Al-2,5V. Personally, I have never seen another frame made exclusively from 6Al-4V tubes.
Also the details on the frame and reinforcments with the use of sleeved tubes are pretty far out: