This Manchester double jigger is 3 5/8" tall with a diameter on the larger pour of 2 1/8" and a diameter on the smaller pour of 1 3/4". It weighs 68 grams.
This jigger has an applied eagle with a set turquoise heart on one side of the large pour and an applied EF double monogram on the other side. The small pour jigger is plain, and both jiggers have a rolled rim.
On the inside of the cup for the big pour, the Manchester hallmark, sterling, and 863 is stamped.
Even though Manchester produced lots of juleps and jiggers, I was not expecting to find this stamp on the jigger.