Vintage Philips Suction Microphone LFH-0116 or LFHO 116 Austria Conference

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Vintage Philips LFH0116 suction microphone

RARE/VINTAGE 1960s-1970's Philips LFH 011600 Suction Microphone (Made in Austria)

This is a very rare find and excellent quality

The suction action is, most probably, to listen in to telephonic conversation and record it.