For sale a matched pair of Siemens B25040A capacitors, rated at 4µF and 300V. 

These are vintage metallized paper (MP) capacitors, well known for their robust construction and long-term reliability. Originally designed for AC applications such as motor run, filtering, and industrial equipment, they are also appreciated today by audio enthusiasts for use in vintage and DIY projects.

Both capacitors are New Old Stock (NOS), unused, and come with clearly visible original Siemens markings. They are from the same series and batch, making them suitable for paired use in dual-channel or symmetrical circuits.

Multiple matched pairs are available: three pairs are dated 02.62 (February 1962), and one pair is dated 11.61 (November 1961), all clearly marked on the body and well preserved.

Metallized paper capacitors of this type are valued for their stable performance and characteristic vintage sound when used in audio applications, while still offering the durability expected from industrial-grade components.

The units are in excellent physical condition, with only minimal signs of long-term storage. Stored in dry conditions and not recently tested under load.

Ideal for restoration work, tube amplifiers, vintage equipment, or collectors looking for original Siemens components.

Price is for ONE PAIR (TWO PIECES)!