Frequently the phrase "safe storage" is taken to mean "storage in a safe" as opposed to the more common legal requirement of secure storage. Sometimes it's the same, but more often it isn't.
On a side note Marlin made millions of "take down" .22 rifles. Models 39 and 39A from 1921-2007. Loosen the thumb screw; cock the hammer and they separate into two sections. This Model 39 is from about 1926.
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39-2.jpg