Here is a vintage sterling silver double jigger marked “Hencho en Mexico L M. DEF 925” in a triangular mark and “Sterling” beneath that.. “Hencho en Mexico” means made in Mexico. This mark is at the bottom of the smaller side cup.
It measures approximately 2 and 7/8 inches tall and the larger cup measures about 1 and 1/2 inches in diameter, the smaller cup 1 and 3/8 inches in diameter. It weighs 39.6 grams.
This jigger is available for sale here at my Etsy shop: https://www.etsy.com/listing/629982006/sterling-silver-double-jigger-made-in