Please Identify This Tonearm Manufacturer

Hello! In order not to multiply the topics, please answer which the name of this tonearm?:

Thanks in advance for your reply!
 

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Jeff, I apologize for the long silence. The owner of turntable is my a familiar, his he bought it faulty, some parts are missing.
Some clarification - is SYSTEMDEK IIX 900.
 

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  • Systemdek IIX 900 with Delta Inertia Tonearm ins.jpg
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  • Systemdek IIX 900 inside.jpg
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Especially turntables are easy to be understood as resonance systems. A counterweight is a resonating mass that significantly affects the quality of the low frequency sound.
If I had counterweights, I would try to decouple. For example, by suspending them from a thread.