Original British Victorian Era Royal Welch Fusiliers Bearskin Busby Brown Bess Musket Parts so it is most likely

so it is most likely chambered in

since the display of  German WW2 symbols is regulated

Which translates to "Fukueki suru" which is a personal creed of the soldier who owned it

The bands are nicely detailed with a pattern of oak leaves

but most marking and dates are very faded and/or not visible

Original British Victorian Era Royal Welch Fusiliers Bearskin Busby Brown Bess Musket Parts so it is most likelyOriginal Item: Only One Available. Royal Welsh Fusiliers pattern Bearskin helmet fitted white hacker and correct original grenade badge of the Royal Welsh Fusiliers. The busby is complete with the linked chain scales chinstrap. Body of the busby remains in good overall condition. Size is approximately a US 7 (56cm). The Royal Welch Fusiliers was a line infantry regiment of the British Army and part of the Prince of Wales' Division, founded in 1689