We have an Episcopal  Brass Letter opener nos.  It dates to around the 1990's, it was purchased from a jewelry factory which had gone out of business.   It is boxed with the surround around the opener black velvet.  The letter opener measures about 5 1/2" in L x about 1 3/8" across the top round where the sheild is and about 1/4" before it comes to a point at the opposing end.

Episcopal Shield Brass Letter Opener NOS