vintage paper oil block capacitors 4uF +4uF +1uF Ludwig Baugatz,  rarity 

Paper-in-oil capacitor 03.1944 year of issue.

Oil paper block capacitors for restoring vintage devices or sound film, audio tube amplifiers

Tests have shown that the rating has remained unchanged over the past 80 years and the capacitor dissipation factor at a frequency of 1 kHz is less than 0.01, which is better than the maximum dissipation factor of 0.015 for modern capacitors.

Three capacitors are arranged in a block, measured

4.0741uF loss factor (DF) 0.0092 @ 1 kHz

4.0732uF loss factor (DF) 0.0089 @ 1 kHz

0.970uF Dissipation factor (DF) 0.0077@ 1 kHz