1921 Letter Discussing Government Technology Contract & Engineering Diagrams For Sale

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1921 Letter Discussing Government Technology Contract & Engineering Diagrams:
$149.00

Fascinating papers found amongst a cache of documents belonging to Earl C. Hansen, a California inventor (Vacuphone hearing aid and early wireless radio technology).

This letter is sent to Oliver P Adams sent by an attorney, discussing discussions with the government over contacts. It doesn’t include attachments mentioned in the letter, but it does include a report on The Radio Telephone System, presented by Mr Hansen for a test at Mare Island.

Cool piece!

Wear commensurate to age, including, possibly, chipping at edges, folds, and other minor issues. You get what you see :)

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