Most of the modern derringers do not have public data available. We would need make and model to get you in the ballpark of dates.
What kind of shells do you use for a 32 cal 32.auto
It it is the proper ammunition and the maker does not prohibit it in the owner's manual, yes.
@ 1966
Your derringer was made in the 1960s and 70s.
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manufacturing
$75
32+d
1906
No published data
25-100 or so
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