I would like to think that the PAO Leicestershire Yeomanry Cavalry Bell top shako plates might have been done in silver? I know that the Officers had a bi-metal version (appears to be)...... there is one at the Leicester Museum in New walks. This was owned by Col Legh-Keck......
There are two types..... one with QVC - Light Dragoon Helmet - (see above) and one without - Bell top shako - (see below)... this has a black enamel centre to high light the "LYC".