Resistor SP3-39 up to 01.86g., With the sign "rhombus"
resistors SP3-39 are suitable with the "rhombus" sign until 01.1986. Very rarely we have come across suitable elements from 1987-1988. After 01.1986. all resistors must be disassembled and what color the slider is on the base. If the color of the slider is copper, then such resistors are not suitable for scrapping. If the color is steel, then they are suitable,