As with the SQ thread , I have gleaned a number of interestingnbits and pieces regarding Sansui QS .
Not everything will be in exact chronological order but what the hell it was almost 50 years ago so forgive me.
As before I will supply the date and page from Billboard for your own reference.
(MONTH -DAY -YEAR ;, PAGE)
Sleuthing BILLBOARD for quad items , took me 4 months , fwiw . And No QQ either, just focused on the task.
Not everything will be in exact chronological order but what the hell it was almost 50 years ago so forgive me.
As before I will supply the date and page from Billboard for your own reference.
(MONTH -DAY -YEAR ;, PAGE)
Sleuthing BILLBOARD for quad items , took me 4 months , fwiw . And No QQ either, just focused on the task.