Yup , seeyouthere .
The fuller is used on a variety of knives , esp with those that involve inflicting stabbing wounds .
Among other purposes , the fuller tends to allow the wielder to withdraw the knife from a deep stab , via letting air into the wound & the vaccum created by withdrawing the blade .
The pommel (derived from the Latin , "little apple") on your blade could have been used to whack somebody , and is designed to help balance your knife .... the other purpose of the pommel on your knife is to help prevent the slippage 'from the hand' , when slippery blood/body fluids accumulate on such a knife when in combat .
Sorry about the gory description .