Diamond with WBS inside then three squares, first square has a thistle in it, second has a castle, third a letter f.
Here is a pic of the WBS brooch - but not of the marks - my camera wont focus so close - I will borrow one soon and see if I can upload the marks here, sorry to make my query tricky in the meantime.

The second Cairngorm I believe is a token between lovers to ensure safety while parted. It has a stamp on back saying MIZPAH with two hearts joined with an arrow.

Does anyone have any other info on this one?
On either - are the stones likely to be coloured paste or amethyst?
Both came from estate sales from ladies in NZ born early 1900s
Many thanks Jenny - a fledgling silver collector