говорящее письмо

[Kathryn Duda]

Dear listserv, 

I am looking for information regarding the technology and practice of sending "speaking letters" or "sound letters" (звуковые письма). The period I am particularly interested in is the 1950s, although anything earlier would also be helpful. Additionally, if anyone has a picture of a recording device or such a letter that would be tremendous. I am wondering how "built to last" they were and how many times they could be listened to. But I am especially interested in how wide the practice was. 

I have found a couple hints of this online that I have linked to below in order to get a feel for what I am looking for.
http://itar-tass.com/spb-news/866537
http://oldradio.onego.ru/PLASTINKI/letters.html

Please feel free to respond to me off list. zippitykdda at gmail.com
thank you,
Katie Duda
-- 
Kathryn Duda
PhD Candidate
Russian Lecturer
University of Chicago
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