Congratulations on your first post - with photos! I slightly edited the detail shot to reduce the width and increase the quality.
I have just been searching the forum for 'Kachin' and found this thread with the remnants of an old tunic/blouse which has similar weaving to your skirt viewtopic.php?f=1&t=1440&hilit=kachin
Also, have a look at this long thread - several pages - for a 'puzzling bag' which is probably the most looked at thread on the forum. The bag turned out to be Kachin and there are some others from the same area. viewtopic.php?f=1&t=108&hilit=kachin
Not quite like your bag but with some similarities. I put together a photogallery of Kachin bags http://www.tribaltextiles.info/Gallerie ... n_bags.htm
and gave some background on Kachin (a word used both as an place and a group - which has several sub-groups) including Jingpho.
on-line tribal textiles resource