The Queen's Royal West Surrey Regiment Diamond Pendant
 
The early Christians learned from St Paul that Jesus was the sacrificial Lamb of God and it is this image that we see here, the Lamb with a halo, carrying a white banner with a red cross.
 
The Paschal Lamb is said to be the oldest of all regimental badges and its association with the Queens has two possible origins.
One account says that the lamb was the symbol of the House of Braganza and was confirmed as the badge of the Regiment in 1751 in recognition of its service in Tangier, a city associated with the House of Braganza.
An alternative version suggests it was adopted much earlier as a symbol of the Regiment's employment against the Moors in Tangier.
Note that the flag was supported on the lamb's right shoulder in most versions of the badge, but on the left between 1898 and 1921. Also, the flag had a swallow-tail end until the 1921 change when it became squared.
In 1898 the name remained the same but it adopted a new badge, the lamb above a scroll bearing THE QUEENS.
 
This places the date for this pendant at around 1898. 
However it is not a cap badge but was a brooch, the high carat gold and diamonds suggesting it was for a high ranking Officer, or his wife.
 
The lamb is set all over with diamonds, in silver settings, and with a sapphire eye. He has a silver halo and carries a gold, enamelled English flag over his left shoulder.
He is backed with high carat gold.
The royal blue enamel banner he stands upon is also high carat gold, with THE QUEENS in gold letters.
 
Weighs - 4g
Measures - 32mm x 25mm
English circa 1898
Excellent condition
High carat gold
Condition - Excellent