<https://shop.yesterdayschange.com/products/1941-new-zealand-penny-km-13-about-uncirculated>
<http://schema.org/mpn>
"6131018039323"^^<http://www.w3.org/2001/XMLSchema#integer>
<https://shop.yesterdayschange.com/products/1941-new-zealand-penny-km-13-about-uncirculated>