Harksound was a brand name from CEC Japan and the Harksound turntable range was aimed at the "mid-range quality" buyer, the most obvious feature being the suspended sub-platter and tonearm assembly used on this model and others in their range.
Harksound Turntable Owners Manual
Model: HS 510
Original
4 language manual
Describes major components and their locations
Unpacking & Assembly
Tonearm adjustments
Connection to external equipment
Where to position your turntable
Operation: Playing records, cleaning the stylus, pitch adjustment
Maintenance: cleaning, lubrication
CONDITION:
In very good condition, clean pages, no tears
No missing pages
Stored in sealed plastic to maintain the condition