Like most Japanese hi-fi manufacturers in the late 60s, 70s and 80s Sansui offered a variety of turntables at different price points targeting different classes of users. While most models were rebranded stuff, some of the higher-end units were either manufactured by Sansui of contract manufactured to their specs. I do not believe that Sansui ever manufactured a tonearm, but OEM'd from sources such as Arco and Jelco.
The Sansui SR-838 and SR-929 turntables are excellent performers, especially in their price range. These were probably the best Japanese turntables available in that period, excepting the high-end Luxman decks (300 & 400 series). I prefer the 838 unit - it's a simpler design, is more available and costs a lot less. If you can solder I suggest rewiring the tonearm with Cardas wire (costs less than $30); makes a big difference. More information here:
The Best of Sansui - Turntables
The Sansui SR-838 and SR-929 turntables are excellent performers, especially in their price range. These were probably the best Japanese turntables available in that period, excepting the high-end Luxman decks (300 & 400 series). I prefer the 838 unit - it's a simpler design, is more available and costs a lot less. If you can solder I suggest rewiring the tonearm with Cardas wire (costs less than $30); makes a big difference. More information here:
The Best of Sansui - Turntables