French WWI Adrian Pattern Artillery Helmet

Original era manufacture. Fairly complete example with its original crossed cannon insignia and original period liner. Matching paint and color exterior, showing an old overpaint, perhaps Army done. The helmet is fairly free of dents, the liner is quite solid. The only comment would be a small 2-3mm hole in the left side of the crown of the helmet. I don't believe it is a shrapnel hole, no idea what caused it.