The green grease is more than likely waffenfet or automatenfett. Waffenfett is yellow/amber grease that can turn (light) green with age and/or exposure. Waffenfett is conjectured to be a sperm oil & lanolin based grease, and was replaced by automatenfett in the '50s. Automatenfett is a dark grey/green lithium grease.
Both are excellent.
http://www.lba.admin.ch/internet/lba...19.3328v02.pdf