Description
Sanken 2SA1116 / 2SC2607 TO3 transistors you can find in the newer Sansui audio products like on G9700 receiver or as substitute for NMA /NMC custom Sanken made for Sansui (like NMA1012 NMC1012 or like NMA1216 NMC1216).
Those NMA - NMC combination you can find at Sansui AU919 or AU819 or BA-F1 and 2SA1116 / 2SC2607 are perfect substitution for them, please take a look to the next picture scanned from Sansui Service Manual

Today on the market, you can find so many fake transistors from China, it would be good for you to read the next thread what I have written on one forum:
https://www.diyaudio.com/forums/swap-meet/259617-genuine-sanken-2sa909-2sc1586-2sa1116-2sc2607-2sa1117-2sc2608-sale.html
So, I know how look like fake transistors, and I am selling here just only genuine transistors!