Spain
units of mass for precious metals

Gold

According to Altés (1832), continued use of this system in Spain was prohibited by a royal ordinance of 31 August 1731, but Doursther (1840, page 92) personally witnessed its survival in Chile and Peru in 1838.

marco of Castile

castellano

50

tomin

8

400

grano

12

96

4800

47.9 mg

575 mg

4.6 g

230.0 g

Silver

marco of Castile

onça

8

ochava

8

64

adarme

2

16

128

tomin

3

6

48

384

grano

12

36

72

576

4608

49.9 mg

599 mg

1.80 g

3.59 g

28.75 g

230.0 g

Silversmiths also divided the tomin into 3 quilates.

sources

El Marco tiene 8. onzas , ó media libra; si es de oro se divide en 50. Castellanos: cada Castellano tiene 8. Tomines; y el Tomín 12. granos; pero si es de plata, se divide en 8. onzas: cada onza de 8. ochavos; y cada ochavo de 72. granos.

The marco is 8 onza, or half a libra. If it is gold it is divided into 50 castellanos; each castellano is 8 tomines, and the tomin 12 granos. But if it is silver, it is divided into 8 onzas, each onza of 8 ochavos, and each ochavo is 72 granos.

Diego de Guardamino.
Prontario y Claves de las Correspondencias, que, entre si, tienen las Monedas, Medidas de Garnos, de Palmos, y Peso sutil de Castilla…
Madrid: Antonio Marin, 1757.
Page 98.

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