Thank you for the prompt reaction, Michl
.
I suspect however that my point was missed
.
I know (knew) how powder testers work, as i am familiar with candle lighters; but none of those have a straight handle or and a manual ignition system, instead of the current mechanical ones ... flint, percussion, etc.
I also don't see how in the 19th century, this 'cannon/gonne' ignition style was still in use
