fbi_formLegibility: medium
Part 73, page 105
DB Cooper-31435Serials SE 164-81-7228
Open in FBI Vault (Part 73, page 105 of the PDF)
FBI 164-81, Vault Part 73 p. 105 (DB Cooper-31435), Other, serial SE 164-81-7228 (as read from the transcript) — cooper.theunsolved.net/parts/Cooper-Part-73/pages/105
Transcript
The scan is the source; the transcript is machine-generated from it.
DB Cooper-31435
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SubR 164-81-[guess: 7228]