2.. Magen David
3.. all hechshers
Some details of Rabbi A. Hochwald z"l may be found here.
The Magen David at the centre of the design is composed of half-tone dots. Source: Chocolate and Love dark chocolate with coffee, 100g. Hechsher diameter: 5.5mm.
Authority: Rabbi Tuvia Hod-Hochwald, Germany
Source: PEMA Pumpernickel Bread, 100% whole grain, 500gm
Format: part of package design
Date: September 2012
Size: diameter: about 10mm