"THE SHOW MUST GO ON" 1940s BELL & HOWELL FILMOSOUND 16mm MOVIE PROJECTOR SALES FILM XD10554
10:52
1937 BELL AND HOWELL FILM “ HOW MOTION PICTURES MOVE AND TALK ” 16mm & 35mm FILM PROJECTORS XD14224
18:17
Operation and Care of the RCA 400 16mm sound projector
18:28
Bell & Howell Filmsound 16mm projector replacing main drive worm gear
30:17
"TOOLS OF TELEPHONY" 1956 WESTERN ELECTRIC TELEPHONE SYSTEM PROMO FILM BELL SYSTEM 98694
14:30
“ FACTS ABOUT PROJECTION ” 1975 AUDIO-VISUAL CLUB TRAINING FILM 16mm FILMS & PROJECTORS XD46174
24:13
RCA VICTOR MANUFACTURE & RECORDING OF VINYL RECORDS 1956 INDUSTRIAL FILM 60054
28:30
TWISTED: Cómo llegamos al Ethernet de par trenzado
27:14