The 42nd(The Royal Highland Regiment of Foot)(The Black Watch) Piper's Baldric badge
To the centre,St Andrew with The Cross surrounded by a wreath of thistles very similar to the pre 1881 Cameron Highlanders glengarry badge.
To the rear 2 oval silver posts about 1/4 of an inch wide and half an inch in height to enable it to be safely held.
The posts are impressed "STERLING"
Very early,very tasty!