Textbook M42 canteen marked ESB 43

Textbook mid to late war constructed M42 steel pattern canteen. The canteen cup and the flask itself are both nicely marked ESB 43 which indicates production by Eduard Sommerfeld, Berlin in 1943. The cup is interesting because it features 3 layers of paint, red primer, olive green and as finish dark green! Interesting canteen with a textbook construction in good used condition!