I recently purchased this antique WW1 pin at an estate sale and have been unable to identify...The pin has a large artillery shell surrounded by a wrealth with a standing lion in shield with the letters "SPA". The back of the pin is embossed "289" "WJD" and equipped with 3 hallmarks (Anchor, Lion, S). I found that the hallmarks date the piece to 1917 (during WW1). I know the piece is sterling silver but cannot find any other information. I am looking to identify the Country and unit? Any help would be greatly appeciated.
