square diamond format
Unlocking History Concept uri
https://letterlocking.org/doll/concept/506
Preferred label
square diamond format
Alternative label
quadrilateral – square diamond format; diamond-shaped letterpacket; 4SD
Scope note
A letterpacket with four distinct edges of equal length. When oriented so the address can be read, the packet is diamond-shaped.
Top concept
techniques
https://letterlocking.org/doll/concept/611
Broader/Parent concept
square format
https://letterlocking.org/doll/concept/507
Related concept
letterlocking category (techniques)
https://letterlocking.org/doll/concept/225
The Arts & Architecture ThesaurusⓇ Online, The Getty Research Institute Concept uri
Not in AAT
The Language of Bindings Thesaurus (LoB) Concept uri
Not in LoB
Scope note source reference
Source
Jana Dambrogio, Daniel Starza Smith, and the Unlocking History Research Group. Letterlocking, The Hidden History of the Letter. Cambridge and London: MIT Press, 2025.
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