Posted by Paul Sandler, NGC Grader on 1/20/2015
Wheel marks are most often seen on 20th-century silver and are easily missed by the inexperienced eye.
Tanda roda yang paling sering dilihat di perak abad ke-20 dan mudah terlepas dengan mata yang tidak berpengalaman.
Wheel marks are a concentrated area of hairlines that are caused by the rubber wheels in coin counting machines. When there is insufficient spacing between them, the wheels can essentially polish a small portion of the surface of the coin. These wheel marks are most often seen on 20th century silver such as Mercury and Roosevelt dimes as well as silver Washington quarters since these are the types of coins that you would most expect to be run through counting machines by dealers.
Tanda roda adalah kawasan yang penuh garis bulu yang disebabkan oleh roda getah di mesin syiling pengiraan. Apabila ada jarak antara mereka tidak mencukupi, roda-roda pada dasarnya boleh menggilap sebahagian kecil permukaan duit syiling. Tanda-tanda roda yang paling sering dilihat di perak pada abad ke-20 seperti Mercury dan Roosevelt dimes serta perak Washington pihak kerana ini adalah jenis duit syiling yang paling anda inginkan untuk dijalankan melalui mesin menggira oleh para peniaga.
While they are easily spotted by an experienced coin grader, they can be quite difficult for those who don’t know what they are looking for to see. Below are some examples of wheel marks on Washington quarters.
Walaupun mereka mudah dikesan oleh pemeringkat syiling yang berpengalaman, ini boleh menjadi agak sukar bagi mereka yang tidak tahu di mana yang mereka perlu cari untuk melihat. Di bawah adalah beberapa contoh tanda roda pada suku Washington.
Photographed in normal lighting, this 1954 Washington Quarter looks
completely normal aside from the small die break on the eagle’s wing.
