Science Museum Group Collection
© The Board of Trustees of the Science Museum
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Science Museum Group Collection
© The Board of Trustees of the Science Museum
PH Helmet-type gas mask, cotton
Science Museum Group Collection
© The Board of Trustees of the Science Museum
PH Helmet-type gas mask, cotton
Science Museum Group Collection
© The Board of Trustees of the Science Museum
PH Helmet-type gas mask, cotton
Science Museum Group Collection
© The Board of Trustees of the Science Museum
PH Helmet-type gas mask, cotton
Science Museum Group Collection
© The Board of Trustees of the Science Museum
PH Helmet-type gas mask, cotton
Science Museum Group Collection
© The Board of Trustees of the Science Museum
PH Helmet-type gas mask, cotton
Science Museum Group Collection
© The Board of Trustees of the Science Museum