In this experiment, we propose to analyze a lamellar structured helmet, with no rivets visible, from the Saotome school, whose products are considered, by most experts, as the best helmets ever made, before the Industrial Revolution and the development of modern materials. This category of helmets is composed by 64 platelets, radially arranged around a hole on the top. The morphology and construction method of the helmet has been fully identified by means of neutron tomography reconstruction, performed at the NEUTRA beam-line. We propose, to complete the cycle of neutron measurements on this sample, the determination of the residual strain distribution inside a few single platelets along their section.