Capacitors K52-2S, K52-5S, K52-5SV black cover - quite rare capacitors marked K52-2S and K52-5S.
The difference from conventional capacitors of the K52-2, K52-5 series is the addition of the letter "C" to the K52-2 and K52-5 marking.
There are also capacitors with the designation K52-2 SV, K52-5 SV, the letter "B" means "all-climatic performance". There is no difference for the price.
Since 1995 minus 5% of the price on the website