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Finnish M40/55 contract helmets, one is the last M40 clone produced with 3 holes for split pins to mount a liner, after that the M53 was developed. Other shell is M40/55 helmet
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Original German M40 WWII Type Steel Helmet- Finnish M40/55 Contract – International Military Antiques
![Original German M40 WWII Type Steel Helmet- Finnish M40/55 Contract – International Military Antiques Original German M40 WWII Type Steel Helmet- Finnish M40/55 Contract – International Military Antiques](https://www.ima-usa.com/cdn/shop/products/gg4055xw__6.jpg?v=1628400626)
Original German M40 WWII Type Steel Helmet- Finnish M40/55 Contract – International Military Antiques
![Frontiers | Magnetoencephalography Responses to Unpredictable and Predictable Rare Somatosensory Stimuli in Healthy Adult Humans Frontiers | Magnetoencephalography Responses to Unpredictable and Predictable Rare Somatosensory Stimuli in Healthy Adult Humans](https://www.frontiersin.org/files/Articles/641273/fnhum-15-641273-HTML/image_m/fnhum-15-641273-g001.jpg)
Frontiers | Magnetoencephalography Responses to Unpredictable and Predictable Rare Somatosensory Stimuli in Healthy Adult Humans
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