Quartz Avoirdupois Pound, known as "Q"
The Quartz Avoirdupois Pound known as "Q", made for the Standards Commission of 1846 (with bevelled corners)
The Quartz Avoirdupois Pound known as "Q", made for the Standards Commission of 1846 (with bevelled corners)
The Quartz Avoirdupois Pound known as "Q", made for the Standards Commission of 1846 (with bevelled corners)
Wooden case for quartz Avoirdupois Pound known as "Q", made for the Standards Commission of 1846.