Puckerings has dated this piece to the 1910s.

One of these ovals is where the crisp English hallmark can be found for Birmingham 1911, together with the makers initials A.J.P & Co., I think for A.J. Pepper.
Excellent condition, measuring 1 3/8" thick x 1 3/4" in diameter. 0.79 Troy Ounces / 24.5 Grams.
Item ID: 32714
——————
FREE Worldwide Registered Airmail Directly From London, England
Puckerings has dated this piece to the 1910s.
A quality online collection of fine english antique smalls with free worldwide shipping from london, england
You can view the stock and full dealer information on the Puckerings Profile Page