HUGE Knife Help

[JISX]

Hi all,

Can someone please help me ID the age, origin and possibly maker of this huge antique knife? It's overall length is roughly 15-1/4 inches, blade is roughly 10 x 1-7/8 inches and it weighs roughly 22 oz.

It appears hand-made of steel, brass and stag/bone(?). It's numbered on one side and on the other, faint remains of a maker's name that begins with an 'SC'.

The knife was purchased in the suburbs just outside of Philadelphia, PA. After an exhausted search, the only maker I could locate within my tri-state (NJ, PA, DE) area (assuming it's locally made) with a maker's mark that begins with the letters 'SC' was/is Schively of Philadelphia, but I'm sure I'm wrong?

Thank you all in advance for your time and thoughts!