78 RPM 12” Columbia MasterWorks “Constant Tone Frequency (mono) Record”, ca.1929
  $   69

 


$ 69 Sold For
Sep 1, 2022 Sold Date
Aug 12, 2021 Start Date
1 Number Of Bids
  USA Country Of Seller
eBay Sold at
 
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Description

This single-sided technical test series record is bright and shiny with no scuffs or scratches; VG++.  A perfectly beautiful copy of this 1929 pressing.  Also included, and in VG+ condition, is the DECIBELS / FREQUENCY IN CYCLES PER SECOND graphics chart showing the frequency characteristic recorded on the record.


Technical Series Test Disc Technical Series CT-52 CONSTANT TONE FREQUENCY RECORD, 10004-M.  50 cycles to 10,000 cycles.  Play: outside-in. Recorded frequencies are announced on the record. 


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