spiral lock
UH0078
Unlocking History Concept uri
https://letterlocking.org/doll/concept/504
Preferred label
spiral lock
Alternative label
self-stabbing spiral lock; butterfly lock; recursive perforation lock
Scope note
A high-security, narrow lock-SA that repeatedly passes through slits in the letterpacket, and, usually, itself in a series of circular movements.
Top concept
features
https://letterlocking.org/doll/concept/605
Broader/Parent concept
lock (lock techniques)
https://letterlocking.org/doll/concept/63
Related concept
distinctive letterlocking style
https://letterlocking.org/doll/concept/104
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 and Daniel Starza Smith with the Unlocking History Research Group. Letterlocking: The Hidden History of the Letter. Cambridge and London: MIT Press, 2025.
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