The GM-48K was a gas mask made by Samgong. The facepiece bears resemblance to the Japanese Type 2. Has a KSM 6674 mark which is for industrial gas mask. (In South Korea) Could be a copy of GM-48 which is industrial version of JSDF type 2.
Overview[]
GM-48K with late type of KM9A1 filter
GM-48K kit. Bag, anti dimming kit, manual, filter and mask.
facepiece of GM-48K
GM-48K found in factory http://www.ecobs.co.kr/news/articleView.html?idxno=10762
anti dimming kit
manual
inside of the mask