Interesting posting on my old stomping grounds at the Ethnographic Edged Weapons Forum.
"Dha" is a Burmese term that simply means "blade." We in the West use it to refer to a variety of sword-and dagger-length weapons that are used by a variety of people in continental Southeast Asia (which means present-day Burma/Myanmar, Thailand, Laos, Cambodia and Vietnam). The use of what we call a dha also extends into the extreme northeast of India, in the Assam and Naga hills, and into southern China in what is today Yunnan Province.
Swords: A sword dha, called a
dha lwe in Burmese and a
darb or
daab in Thai, is any sword with a single-edged blade that generally widens progressively toward the tip, but not more than to a length/tip width ratio of perhaps about 5/1 or 6/1 (blades with very wide tips are called
dha ma - choppers - in Burma). The cut-off is sort of subjective, at least for me. Spines are rounded, flat, peaked or various combinations. Rarely there is a groove in the spine. False edges are not uncommon. Blades are often engraved or decorated with koftgari or inlay, on the flat and spine, some very elaborately. They are often of laminated or inserted-edge construction, and often have a hardened edge. Tangs are usually very short, and "blind," i.e., inserted into the handle and held by pressure or adhesive. I have never seen a pinned tang.
The tip can be upswept, angled (forward or reverse), square, round, convex, spear-shaped or "sheep's foot" (where the spine curves down toward the edge). There are specific names for each of these tips in Thai (see the Glossary page at
The Dha Research Index).
Handles are almost always of a round cross section, and can vary in length from about hand-width to about equal in length with the blade. A pommel may or may not be present, and is either spherical, a sort of flattened cone, top-shaped or lotus-shaped (there is a variation of this that looks sort of like a conch shell). Sometimes it is just a simple cap on the handle. I have never seen a disk-shaped pommel, though some round ones approach a lense shape (wide axis perpendicular to the handle). There is generally no guard, though the ferrule often flares toward the blade; some Thai darb have a small tsuba-style guard, and some "montagnard" dha have a diamond-shaped guard that is almost more of a spacer as it barely exceeds the diameter of the handle. "Village" dha often have neither pommel nor ferrule.
Scabbards are generally wood, often with metal bands, or partial or complete metal sheathing. "Village" dha tend to have braided cord or rattan bands. Scabbards usually start with a round cross-section equal in diameter with the ferrule, and progressively transition to a flat cross-section, either square-ended, rounded or more rarely up-swept. In Burmese dha, the scabbard is usually suspended from a cord baldric hung from one shoulder; in Thailand the scabbard can be hung from the shoulder, across the back, or as a crossed pair on the back (this might be the case in other parts of SEA, but I just don't know).
Daggers: Daggers are called
dha hmyaung in Burma (not to be confused with a simple utility knife, which is called a
dha mauk). I don't know what they are called in Thailand and other parts of SEA. They basically resemble miniature
dha lwe, with a single edge and either upswept of spear-shaped tip. Like the swords they can have laminated or inserted edge construction, and hardened edges. Handles are sized to fit the hand, and in style follow those found in swords. Scabbards again are smaller versions of those of sword-length dha, though there is a style of dagger scabbard that has a round cross-section. There is another type of knife used in SEA that has a down-ward curved blade, similar to a yatagan or piha ketta, which we Westerners call a "priest knife" because, surprise, it is used by priests."
Also of note to anyone interested in dhas, is the Dha Research Project. It can be found at
http://dharesearch.bowditch.us/IntroductionFrame1Main_Page.htm
This is a site dedicated to examining and classifying the different designs and types of dhas and related weapons, and the project includes the cultures and tribes that most commonly use the different types. A very enlightening read for anyone interested in the nitty gritty of designation, classification and collection.
Phil, you might be interested in the pictures section of the research site. It has a few photos of Kachin tribesmen in a parade. The majority are carrying the nhtu you mention, but it looks like some are carrying the more common slender long hilted type of dha, but with the flattened tip.