# Sanborn's private Kryptos archive (K4 plaintext, K4 coding system, K5, K1-K3 charts, prototype plate)

> Not published. Paradigm's post shows photographs of a mini Kryptos archive item and a curved copper proof plate.

Source: https://mysteriesdept.com/mysteries/kryptos/artifacts/ART0D7HTJ281HN8/sanborns-private-kryptos-archive-k4-plaintext-k4-coding  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

---

[Mysteries](https://mysteriesdept.com/mysteries)[Kryptos](https://mysteriesdept.com/mysteries/kryptos)[Artifacts](https://mysteriesdept.com/mysteries/kryptos#artifacts)Sanborn's private Kryptos archive (K4 plaintext, K4 coding system, K5, K1-K3 charts, prototype plate)

**ART** 0D7HTJ281HN8·Artifact · document

# Sanborn's private Kryptos archive (K4 plaintext, K4 coding system, K5, K1-K3 charts, prototype plate)

DocumentSold 20 November 2025

[Cite]

Not published. Paradigm's post shows photographs of a mini Kryptos archive item and a curved copper proof plate.

## Copies 0

## Where it is kept

[RR Auction, Boston area](https://mysteriesdept.com/records/PLC0D7HT1YM5XBY/rr-auction-boston-area) · Auction house

## Sources 2

- [Jim Sanborn's Complete Kryptos Archive Sells for $962,500 at Auction](https://mysteriesdept.com/sources/SRC0D7HSZ0W1S9N/jim-sanborns-complete-kryptos-archive-sells-for-962-500-at)_SRC_
- [Project Kryptos](https://mysteriesdept.com/sources/SRC0D7HT0041JD9/project-kryptos)_SRC_

## Cite it

```
Mysteries Department. (2026). Sanborn's private Kryptos archive (K4 plaintext, K4 coding system, K5, K1-K3 charts, prototype plate) [Artifact ART0D7HTJ281HN8]. https://mysteriesdept.com/r/ART0D7HTJ281HN8
```

Key

**ART** 0D7HTJ281HN8

Kind

Document

Held by

Paradigm (bought at RR Auction, 20 November 2025)

Dated

sold 20 November 2025; buyer disclosed 12 June 2026

Place

[RR Auction, Boston area](https://mysteriesdept.com/records/PLC0D7HT1YM5XBY/rr-auction-boston-area)

Part of

[Kryptos](https://mysteriesdept.com/mysteries/kryptos)

The record

Every record is open data. Take this one as JSON, with its links and its history.

[JSON](https://mysteriesdept.com/api/v1/records/ART0D7HTJ281HN8)