Thunder mug


#1

I don’t know if this item qualifies for an IAA topic, even though it uses black powder. If it does not, great apologies, please remove it. Thunder mug is a new concept for me. This one is a newly made repro, very heavy so it does not fly when fired. There is a small operture (hole) at the side’s bottom to insert a fuse, the wooden pestle is to pack black powder. According to the seller, ships fired these when entering a harbour to announce their intention to dock. Here is a short history.
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#2

There main purpose was to test the black powder.
Black powder slowly absorbs moisture in storage onboard ships, and needs to be tested every so often, to determine if it is still useable.
Gregg