If 2mm thick blades are common to 'Wedding Nimcha's', and as a ceremonial dagger it's function is to look good, show status etc. Why has mine got a functional blade.
Pure speculation, could it have been made to look like a ceremonial piece, so that a 'live' blade could be sneaked into a Ceremonial environment, perhaps the 'bridegroom' to be, had issues with his new in-laws....
It's a shame that the knife on Oriental Arms does not describe the thickness of the blade, however looking through the additional photos, the knives look almost identical. IMHO the carving and finish of the handle is not as good as mine, and there are slight differences in its shape. The blade looks to be inferior too, but that could be the photograph........or is it because I am bias ....