Original Item: Only One Available. This is a very appealing original British WWI Mk I Brodie helmet manufactured by Hadfield Ltd of Sheffield, complete with its original liner and chinstrap and later fitted with a WWII-era helmet net. The Mk I was one of the defining pieces of British Great War equipment and also has direct relevance to early American involvement in WWI, as large numbers of British made helmets were issued to U.S. troops before American M1917 production fully came online. This example is especially interesting because it combines an original WWI British shell with a later green repaint and WWII-applied net, creating a helmet that appears to have remained useful well beyond its initial period of service.

At the beginning of WWI, most armies still sent men into battle wearing cloth, felt, or leather headgear that provided little meaningful protection against modern artillery fragments and falling debris. The enormous number of head wounds suffered in the early fighting quickly forced all of the major combatants to reconsider the role of protective headgear.

France led the way with the Model 1915 Adrian helmet, while Britain developed the broad brimmed steel helmet that became known as the Brodie. Its shallow bowl and wide brim were designed primarily to protect against shell fragments and debris falling from above, one of the principal dangers faced by men in trench warfare.

The British Mk I became one of the most recognizable helmet forms of the war and was produced in enormous numbers for British and Commonwealth forces.

It also became important to the American Expeditionary Forces.

When the United States entered WWI in 1917, it did not yet have sufficient domestic steel helmet production to equip its rapidly expanding forces. British made Mk I helmets were therefore issued to American troops during the early period of U.S. participation. American production later resulted in the closely related M1917 helmet.

The underside of the rim on this example is heat stamped:

HS 173

This is the typical type of British production marking combining manufacturer and steel supplier information with the batch or heat lot number.

The H is associated with:

Hadfield Ltd of Sheffield

a known manufacturer of British Mk I helmet shells.

The S denotes the associated steel supplier code, also from Sheffield.

The heat stamp, together with the split rivets used on the chinstrap bale attachments, is an important indication of British rather than later American shell manufacture.

This distinction matters to collectors because British and American WWI helmets are superficially very similar but differ in several construction details, including shell markings and bale attachment methods.

The exterior has been repainted in green during the WWII era.

This later repaint gives the helmet a second period of military use or reuse and reflects the continued utility of older steel helmets during the interwar and WWII years. We do not have documentation identifying the exact unit or individual responsible for the repaint.

A WWII-era helmet net has also been applied over the shell.

The net is now heavily stiffened in places and has multiple breaks, tears, and holes throughout. It has also loosened with age and no longer sits as tightly against the shell as it once would have.

Even in damaged condition, the net gives the helmet strong visual character and makes the piece especially interesting as a layered artifact showing both WWI manufacture and later WWII modification.

The liner remains present and is in good worn condition.

The central wool pad is retained, and the original rubber doughnut remains underneath it.

The chinstrap is also still present and is in good overall condition, though it shows heavy service wear.

The helmet is therefore substantially complete, retaining the major internal components that are often missing from surviving WWI Brodie helmets.

Condition overall is service worn but very displayable. The shell retains its later green finish, the liner and chinstrap survive, and the WWII net remains in place despite heavy stiffness, tearing, holes, and looseness.

The combination of an original Hadfield Ltd British Mk I shell, HS 173 heat stamp, split chinstrap bale rivets, complete liner and chinstrap, WWII repaint, and later helmet net gives this helmet much more interest than a standard untouched shell. It would fit especially well in a British WWI, American Expeditionary Forces, Brodie helmet, WWII home service or reissue, or early steel helmet collection.