https://timemilitaria.com/ww1-machine-gun-corps-badge
WW1 Machine Gun Corps Badge | Time Militaria
White metal badge with button hole fixing to back in good condition.
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https://www.theauxiliaries.com/men-alphabetical/men-h/hartwell-hw/hartwell.html
Harold William Hartwell. Machine Gun Corps.
machine gunharoldwilliamhartwellcorps