I am trying to determine if this resistor is metal or carbon film?

Traditionally most of the metal film resistors I've seen have been blue, while most of the carbon film I've seen have been light brown.

However, this particular resistor is gray, and I have seen gray carbon film resistors before (though the gray color was probably some sort of coating, I believe).

If it helps, this resistor was found among many vintage, i.e., pre-1970s resistors. When did metal film come into circulation?

enter image description here

  • \$\begingroup\$ If in doubt, buy what you need. Resistors are dirt cheap. \$\endgroup\$
    – winny
    Jun 29 at 21:48
  • \$\begingroup\$ Measure inductance with precise L- meter for small inductance. \$\endgroup\$
    – user263983
    Jun 30 at 2:06
  • \$\begingroup\$ if you don't need to use it you could scrape the paint off and see what type it is with your own eyes. (disclaimer: do not use eyes for scraping, this is not medical advice) \$\endgroup\$
    – Jasen
    Jun 30 at 2:40


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