WWI British Brodie Mk I Steel Helmet – Named “P. Gilbert” – Original Liner but based on the query's

but based on the query's phrasing ("rifle")

likely sold as a gift shop

SSH 68 helmet

a prominent Japanese instrument maker during the war

WWI British Brodie Mk I Steel Helmet – Named “P. Gilbert” – Original Liner but based on the query'sOffered here is an original World War I British Brodie Mark I steel helmet, complete with its period liner and leather chinstrap. Introduced in 1916, the Brodie helmet became the standard combat helmet of British and Commonwealth forces during the First World War. Its distinctive shallow dome and wide brim were designed to protect soldiers from falling shrapnel in trench warfare and quickly became one of the most recognizable helmets of the Great War.