Antique glass measure with egg freshness testing guide

A early to mid century glass kitchen measuring beaker, acid etched with various markings for fluid ounces, levels at which various ingredients measure to 1/4Lb and a pictorial guide on testing the freshness of eggs.
 
Condition:
Very slight wear in places to the etching, otherwise perfect with no damage.
 
Approximate dimensions:
11.7cm Tall (4-5/8")
7cm Rim diameter (2-3/4")