"The TK found on the pistol grip of SS marked rifles is extremely typical of the size and geometry of the TK found on the SS Marked Bayonet Frogs & Rifle Slings."
yes but only for short period of reworking of older equipment which was the gew98 converted to K98k configuration. So the pieces are converted probably in early 1933-38 period.
For SS knots is probably the best book George Wheeler History of german bayonet 1918-45.
