Jim Sanborn Kryptos archive, $962,500, RR Auction

The complete secrets of Kryptos — including the long-anticipated K5 connection and the original K4 coding system that underpins the sculpture’s unsolved passage — from artist Jim Sanborn’s private archive, sold for $962,500 at RR Auction’s “Decoding History: Kryptos K4 & K5, Enigma, and the Rosetta Stone” online sale held Oct. 16-Nov. 20 by RR Auction in Boston.

Also, an Enigma I Military-Issue Cipher Machine (circa 1933) went to a determined bidder for $412,481.