The dragon one is awesome! The fractal/mosaic one is also one of my favorites.
I recently got hold of a couple of pieces of these. The first is an original shirt, but the second I'm not sure.
I've heard that the military drill classes are still electives in some schools in Korea but I'm not sure if they still use this pattern.
There does however appear to have been a recent niche fashion comeback of the pattern in Korea, including more "normal" clothing items and different colorations, like pink!
Here's my first shirt. I'd like to translate the insignia to see what person wore it and from which school, but the stitching and font make it hard to translate.
The patch is slightly coming off unfortunately as well.
My second shirt, which I'm dubious of its originality.
The material is ripstop and very strong and stiff, and the cut I've never seen before in historical photos.
It may possibly be a more recent shirt, like I mentioned before there are apparently some schools that still do the drill electives and they may still use this pattern, but I'd have to see pictures in use before I can conclude that.
It is weird however for a fashion/streetwear piece to have your name on a removable patch across the back.
It's not a one-off either, as I've seen other shirts in this exact cut but with other names on the patches.
The pattern is the exact same on all the shirts like this I've seen, and they're all the same cut and ripstop material.
In the fashion photos I'll post below, you'll see the same cut shirt with the same pattern, the "E" shape in mine can be found in these new streetwear examples, however none of the photos show the backs unfortunately to show whether they come with the velcro name patch.
It has only four white buttons, and a single open patch chest pocket.
The removable velcro name patch on the back has the name "Park Joo-ho"
Historical and modern iterations.