Brooch - rolled gold with pearl

A beautifully designed rolled gold vintage brooch.   The brooch measures about 4 cms at the widest point.  On the Back is stamped Rolled Gold and underneath A*D,  The brooch is in as found used condition.  I have not cleaned it.   I feel that the pearl is a real pearl as it feels slightly gritty.   The colour seems right but no guarantee.   It is a lovely piece anyway.  The clip that closes over the pin has lost the closure bit.

Dont hesitate to ask any questions.