Four concentric bands of continuous spirals, incredibly accurately completed, is bounded by zones with lines and short transverse bands. The belt plate is casted from an advanced technique where you start by building a wax model of the belt plate. This wax model was carefully punched with coils. The stamp consisted of a wire of copper or gold, which was probably put on a little wooden block. After the wax model was complete, it was brushed over with a thin clay mixture which was allowed to dry. Then the bronze caster surrounded the entire model with lean clay, which he burned. A mold of clay with an inter cavity had been created, and the wax had melted away during the heating. The bronze could now be poured into the cavity. After the bronze had solidified, the clay model was crushed. Thereafter, minor errors were corrected, and the surface was polished. The piece was finished.
This sounds relatively simple. But it is not. The best belt plates - like the one from Langstrup - are extremely thin. It is therefore very difficult if not impossible, to find a bronze cast today, who by this technique - called the 'lost wax' – from French à cire perdue - can produce such large and thin objects, where the liquid bronze quickly can be distributed in the quite narrow cavity created by melting away the wax.