Hand book to foreign hall marks on gold and silver plateHand book to foreign hall marks on gold and silver plate

Um livro muito interessante de Cristopher Alexander Markhader, publicado em Londres em 1898. Apresenta os teores das ligas e alguns exemplos de contrastes de vários países. 
Fonte: Hand book to foreign hall marks on gold and silver plate. (With the exception of those on French plate) Containing 163 stamps