Carbon Comp: Aging Causes Out Of Tol?



I have fifty 910 ohm 1/4W carbon composition resistors, still in the
paper tape, which is labeled:

OHMITE
910 OHM
1/4 W 5%
RC07GF911J
OC9115

Judging from the last line, they're 14 years old. They've never been
used, AKA New Old Stock. Every resistor measures greater than 5%, some
are over 1k. Over 14 years, would drift from aging cause them to go
that far out of tolerance? I have carbon film resistore much older than
these and they still measure within 5% tolerance, usually within 2%.

Thanks.
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