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Tags: BTH
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BTH 451 Opt sound Projector
With optical sound only
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BTH
BTH 452 Mag/opt. Sound Projector
One of the later range of BTH projectors and the last to be Produced. It has dual sound facilities. A 1000watt lamp and 1600 ft. spool capacity. The securing of both feed and take-up arms is achieved by the star shaped knob. Standard 2" lens.
Tags:
BTH
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