More to explore:
Fife Yeomanry, Plaid Brooch is simple. Maybe a Celtic knot border in same bronze color as cantle?
Fife & Fofar Yeomanry
The Queen's Own Yeomanry Piper's plaid Brooch. April 1971.
Highland Light Infantry Officers Victorian Plaid Brooch
Fife Light Horse
1861 stable jacket of the Fife and Forfar Imperial Yeomanry
The Fife and Forfar Yeomanry Helmet, 1870's-1890's
Victorian Fife Light Horse Helmet.
Fife Light Horse helmet
Fife and Forfar Yeomanry - Officer circa. 1895.
DUMBARTONSHIRE RIFLE VOLUNTEERS OFFICERS PLAID BROOCH
The 78th (Ross-Shire Buffs) Officers Plaid Brooch What we have here is a magnificent,very early and rare example of 78th regimental Insignia.
74th (Highlanders) Regiment pre 1881 Officer’s undress plaid brooch.