Double ended all sterling highly engraved.  Push button and twist end.  Under the push button (snap) is impressed on a metal disk under the glass sealing disk is "Mordan & Co."  On the bottom of the cap is engraved "August 4th,1882".  The top of the cap has some initials.  Tight fitting cap.  This is unusual and fabulous.  Approximately 4 1/8" long.