I saw this on a bus in Gangneung on Friday. There was one modern hammer; small, light, red with a tiny, specially designed, glass-shattering head. That was next to the bus driver. At the back of the bus were a pair of these blacksmithing tools.
Strangely, this may be the third photo of a hammer to be used in emergencies for breaking glass (Previously here and I think there was one from the same place a year earlier.) I should make it a label or something.
Exams tomorrow: that means 44 one-t0- one oral exams in a job interview format.