European Watch Clock and Jewellery Fair 1986 BF 106
From the collection of Aero Watch pocket watches in solid 925 sterling silver, here is a model that combines modern technology (ETA Quartz movement) with the centuries-old art of niello work. The case back is, in fact, ornamented with genuine niello : paste of lead, copper, silver, sulfur and sal ammoniac processed in the enameling furnace. (AERO WATCH)