Dates to the late Edwardian era, circa 1910.
Crafted in solid 14K yellow gold, and hallmarked as such upon the pin stem. Does bear a partial maker's mark, but it's difficult to decipher.
Bullseye (or bull's eye) motif, bezel set with an Old European cut 3 mm (approximately 0.10 carat) diamond that is nice and clean.
The stickpin measures 2.67" from end to end, with a top portion that measures 0.29". This piece weighs 1.2 grams.
Condition is very good, with no damages or repairs.