Songun Red Flag-class locomotive
…sides and the shape of the upper headlamp. At least one production unit has been seen numbered in the 4000 series (4071); this series is allotted to the Ch'ŏngnyŏnjŏl Kinyŏm-class class, although the highest known number assigned to one of those locomotives is 4056; this could mean that production units are now being numbered from 4070…