The symbol was later stamped on coins minted in gold and silver. The HOG eagle logo is stamped on the coin. The visa is then stamped into their passport. The magazine is assembled from inexpensive stamped sheet metal. The Minimi features a welded receiver made from stamped steel. They were skillfully stamped/adorned according to ancient tradition. During the manufacturing process, vital information is usually stamped or permanently marked on the cylinder. Polarity is usually stamped on the metal casing. On many rivets, a size in 32nds may be stamped on the rivet head. Those who failed were stamped with triangular marks instead. Guild marks were often stamped on the rings to show their origin and craftsmanship. This size number is usually stamped onto the shank (shaft) or handle for identification. Thus a Zippo made in August 2004 was stamped H 04. Additionally, the older stamped slides feature a removable breech block. Patio options include concrete, stamped concrete, and aggregate concrete.