JPEO for Chemical, Biological, Radiological and Nuclear Defense - #ThrowbackThursday: First U.S.-Produced Gas Mask (L), First Improved Gas Mask for Field Use (C), and Primary World War I Gas Mask for U.S.
![Original U.S. WWI M1917 SBR Gas Mask with Carry Bag named to USGI in 3 – International Military Antiques Original U.S. WWI M1917 SBR Gas Mask with Carry Bag named to USGI in 3 – International Military Antiques](https://cdn.shopify.com/s/files/1/1524/1342/products/ONSV3496__10.jpg?v=1595598944)
Original U.S. WWI M1917 SBR Gas Mask with Carry Bag named to USGI in 3 – International Military Antiques
![Original U.S. WWI M1917 SBR Gas Mask with Carry Bag, Instructions, and – International Military Antiques Original U.S. WWI M1917 SBR Gas Mask with Carry Bag, Instructions, and – International Military Antiques](https://cdn.shopify.com/s/files/1/1524/1342/products/ONSV3607__12.jpg?v=1621535256)
Original U.S. WWI M1917 SBR Gas Mask with Carry Bag, Instructions, and – International Military Antiques
![Original U.S. WWI Named M1917 SBR Gas Mask with Carry Bag and Anti-Dimming Stick – International Military Antiques Original U.S. WWI Named M1917 SBR Gas Mask with Carry Bag and Anti-Dimming Stick – International Military Antiques](https://cdn.shopify.com/s/files/1/1524/1342/products/ONSV3620__02.jpg?v=1596424786)
Original U.S. WWI Named M1917 SBR Gas Mask with Carry Bag and Anti-Dimming Stick – International Military Antiques
![Original U.S. WWI M1917 SBR Gas Mask with Carry Bag, Instructions, and – International Military Antiques Original U.S. WWI M1917 SBR Gas Mask with Carry Bag, Instructions, and – International Military Antiques](https://cdn.shopify.com/s/files/1/1524/1342/products/ONSV3608__08.jpg?v=1617307373)