Antique Crosses I Am Looking For The Value Of This Antique Silver Letter Opener I Have?

I am looking for the value of this antique silver letter opener I have? - antique crosses

Silver Medal GROUND Abrecartas
Mark Shiebler, New York, 1880

The hammer handle with Applied medallion topped 14kt cross inside a laurel wreath with "sterling and 14kt 172x and SC & L for Shreve Crump & Low", marked on the back
6.1in.