Heil und Sieg!
The belt buckle has always been an important part of Germanic ritual garb. Many pre-NS groups in Germany took to making their own, by riveting designs and motto's on otherwise plain buckles.
The importance of the buckle comes from the esoteric side of National Socialism - the belief that life resides in the Blood - for the buckle lays over an important Chakra around the navel area- one that has influence over blood.
In the above home made buckle we see a runebinding with the Hail rune and Sieg rune - Sieg Heil!
This detailed picture is taken from the works of Miguel Serrano label the Charkras