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+++ 1963.c. 3M(Scotch) type 270

209 - caseta 3M tip 270 cu cap de banda scos .JPG +++ 1942.a.  Textophon BW4 I - first audio cassette-3rd variant Thumbnails+++  1962.b.c.  caseta/cassette  Orrtronic Tapette+++ 1942.a.  Textophon BW4 I - first audio cassette-3rd variant Thumbnails+++  1962.b.c.  caseta/cassette  Orrtronic Tapette+++ 1942.a.  Textophon BW4 I - first audio cassette-3rd variant Thumbnails+++  1962.b.c.  caseta/cassette  Orrtronic Tapette+++ 1942.a.  Textophon BW4 I - first audio cassette-3rd variant Thumbnails+++  1962.b.c.  caseta/cassette  Orrtronic Tapette

- caseta cu o singura rola, asemanatoare principial cu caseta Grundig pt. dictafonul Stenorette R, aparuta ca cca. 2 ani inainte (vezi colectia); rola este antrenata prin frictiune, banda iese printr-o fanta si este rebobinata prin derulare inapoi; caract: 95 x 95 x 13 mm, viteza benzii> 4,7 cm/sec, latimea benzii 3 mm,durata 96 min. mono sau 2 x 48 min pe o singura fata ;comparatie cu alte 43 tipuri de casete audio - vezi tabelul din sectiunea ''despre casetofon'' .


- one reel cartridge, similar as principle with Grundig DeJur Stenorette R' cassette, issued ca. 1961; friction drive, no fast forward, just rewind; dims: 95 x 95 x 13 mm, speed: 1 7/8 ips = 4.7 cm/sec, tape width- 3mm, time: 96 min mono or 2 x 48 min stereo ; single side;comparison with other 43 types of audio cassettes - see the table from ''about cassette-recorder'' section.

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3M (Scotch) - USA
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