Victorian 15ct Gold Foiled Backed Amethyst IP intaglio Seal Fob/Pendant, c1860

Lovely looking scarce antique English mid Victorian c1850/1860 15ct Gold (fully tested) seal pendant / fob.
It is finished with beautiful decoration and is set with a foiled back Amethyst section,  engraved with the lettering I P in old English script. 
 
Excellent condition age considering,  expected wear to the gold. The intaglio seal section is free from any chips or damage. Please see the photos for more detail.
 
Weight: 3.9grams in total.
 
Size: 22.2mm in height, the base is 12mm by 10.6mm.
 
Materials:-625, 15ct Gold (fully tested) and foiled backed amethyst.