Original correspondence from the Castlereagh Collection for Boston (USA).
- Weighing & Measuring
- Object Number:
1 dwt Avoirdupois (pennyweight): 0.002 kg
1 dwt Troy (pennyweight): 0.002 kg
1 oz Avoirdupois: 0.028 kg
1 oz Troy: 0.031 kg
1 lb Troy: 0.374 kg
1 lb Avoirdupois: 0.456 kg
- Board of Trade (Castlereagh Collection)
- Permanent collection
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