Unlocking History number (UH#)

UH0053



Original

Weronika Gralak's locked letter (UH0053) to Władysława Kerbaczewska in an envelope (UH0020)  



Model and research notes

MIT Libraries, Unlocking History Research Group archive, MC0760, Box 25.



Letterlocking Unique Video number(s) (LUV #s) & Instructional video(s) URL

LUV053 https://youtu.be/Q7bYUkmFF8w 



Instructional video info transcription

Forthcoming



Letterlocking Category number (LC #)

LC02Z + envelope, Document Security



Letterlocking Format number (LF #)

4RW



Security score

Zero



Assessment of Confidence in assigning LC#

Attested



Substrate

Paper



Dimensions

Opened (in mm):     H: 285mm x  W: 228mm         

Letterpacket (in mm): H:   88mm x  W: 152mm



Manifestation

Opened



Distinctive letterlocking style(s)

NA



Locking mechanism

Tuck



Security enhancements

NA     



Letterlocking category formula (shorthand)

LC2 

Fold + Tuck 

(F + T) 



Letterlocking manipulation sequence (shorthand)

Fold + fold + fold + fold +fold + tuck + inserted into envelope



Locking instructions

Forthcoming



Images 

Forthcoming



Foldable(s)

Forthcoming



Step-by-steps 

Forthcoming



Substrate map

Forthcoming



Virtual unfolding results

NA



Manipulations

Writing: NA

Postal: Postage marks

Opening: Tears

Filing (Storage, Display): NA

Repair: NA



Damage

NA



Features

Dirt on panels/ in crease



Article(s)

NA



Book 

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.



Citation for the letter(s)

UH0053, UH0020 envelope

Original 

Weronika Gralak to Władysława Kerbaczewska (14 February 1953). MIT Libraries, Unlocking History Research Group archive, MC0760, Box 31.



Model

MIT Libraries, Unlocking History Research Group archive, MC0760, Box 25.



Video

LUV053

Jana Dambrogio, Daniel Starza Smith, and the Unlocking History Research Group, “Weronika Gralak locked letter to Władysława Kerbaczewska, Poland (1957).” Letterlocking Instructional Videos. Unlocking History number 0053/Letterlocking Unique Video number: 0053, 0020. Filmed: December 2015. Duration: 1:34. Posted: March 2016. URL: https://youtu.be/Q7bYUkmFF8w. Accessed March 4, 2025.






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