I have only seen two military dha, one Andrew's and another someone sent my for comment.   Coincidently I just came across photos of the latter again last night while organizing files (photos are at home, but I'll post them tonight).  Unlike Andrew's, this other one is a Kachin-style sword dao, with a very straight blade and a square tip, and the number "50" inside a box or crown stamped on the forte.  It has a wooden scabbard, too, not a leather one.
Here is a photo I think Andrew had located, showing a squad of Kachin Rangers during WW2.  Dha of both styles are visible in the picture; the ones the first and second (and possibly the seventh) men from the left are carrying resemble the Kachin-style dha, and the sixth man from the left looks like he has one like Andrew's.