16 4-81- 4586

1 page

This was read as a date when the page was transcribed, but it is not one — usually an FBI file or serial number.

LetterFrom FBI Seattle acknowledging citizen tip in Cooper case (Sub 625)5 April 1973 · Seattle · Part 116 · 1 page

p. 60FBI Seattle field office case number for the D.B. Cooper hijacking case. FBI Seattle field office letterhead with address and date. Handwritten annotation, likely a sub-file or serial number refere…