I see a lot of these mysterious marking codes on very old (e.g. 1980) capacitors by different manufacturers.
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\$\begingroup\$ Wild guess: production line number. \$\endgroup\$– winnyCommented Sep 22, 2022 at 16:43
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answered Sep 22, 2022 at 16:43
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\$\begingroup\$ Thank you, probably you are right. \$\endgroup\$ Commented Sep 24, 2022 at 19:18