A quality hf triode 6S3P-DR (6C3П-ДР) from manufacturer Reflektor - Saratov. It is similar to the EC86/PC86 tubes and very close to the WE417A too, but is has a different pinout. High reliable, durable and extra long life version of the 6S3P tube. Minimum of 10 000 operating hours (under prescribed conditions). New in box. Year of production: 1990.