This type of cheekpiece with the bottom edge running up to the comb nose goes by several names. I have heard it called "Altdeutsche Backe" = old German cheekpiece, but R.Mahrholdt in his Waffenlexikon called it "verlaufende deutsche Backe" = running out German cheekpiece as opposed to the common "runde deutsche Backe" = round German cheekpiece, the style even seen on many British rifles. Here is the one on my pre-1912 Haenel M1900:
A "Kaisergriff" ("Kaiser grip" is merely a try to translate it to English) need not be that exaggerated, hooked forward style. At least, the Kaiser did not have a gun with a hooked-forward pistol grip, but owned several with a close, upright pistol grip such as the one on this Bemesu dr drilling. As he had to shoot one-handed this allowed him to have better control of his rifle, but he used guns with normal grips too. See the GGCA's "Der Waffenschmied" #17. BTW, a capless, rounded, hooked forward pistol grip as seen on many 1970s Ferlach guns is named a "Pfeifenkopfgriff" = pipe bowl grip.
