Hillwood Firstman Pulser M-75 Analog Dual Voice Synthesizer
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The instrument

The Pulser M-75 synthesiser was developed by Hillwood and distributed by Firstman in 1977. In the USA, it was offered by Multivox as the MX 75. 

Details

The monophonic, analogue synthesizer has a sound generator with two VCOs, a low-pass filter and an LFO, which can also trigger the envelope to generate sequencer-like sound sequences. Thanks to a ring modulator, unusual, noisy sounds are also possible. The instrument is equipped with a series of presets that can be modified. It has an aftertouch-capable keyboard. (source: Sound and Recording)