Belgian A.G.20
![](https://static.wixstatic.com/media/385e75_884661fb21084fd69d6cd64b1d6c5de6~mv2_d_2808_2808_s_4_2.jpg/v1/fill/w_600,h_600,al_c,q_80,usm_0.66_1.00_0.01,enc_auto/385e75_884661fb21084fd69d6cd64b1d6c5de6~mv2_d_2808_2808_s_4_2.jpg)
![](https://static.wixstatic.com/media/385e75_5783e708d6194ddd9632dd5308dec538~mv2.gif)
The Belgian A.G.20 facepiece was identical to the A.G.15, including the embossed "A.G.15" stamp. But instead of having a small filter attached directly to the mask, there was a corrugated hose leading to a much larger filter. Most likely intended for civil defense, this example was made by L'Anti-Gaz in 1939.
L'Anti-Gaz = "Anti-Gas"
Similar masks in my collection: Belgian AG15, Belgian M1931, Belgian M1934, Belgian AG9, Italian S.A.B. M33, Italian I.A.C. M33, Spanish M33
![Rubber stamp](https://static.wixstatic.com/media/385e75_88faf16cb62549da9c8f6ceb2aeac0f5~mv2.jpg/v1/fill/w_147,h_201,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_88faf16cb62549da9c8f6ceb2aeac0f5~mv2.jpg)
Manufacturer and model stamp on cheek 'L'ANTI-GAZ S.A AGREE PAR LE GOUVERNEMENT AUTORISATION No121" "II"
![Stamps](https://static.wixstatic.com/media/385e75_502233093b8a42f39688db483dc99030~mv2.jpg/v1/fill/w_147,h_92,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_502233093b8a42f39688db483dc99030~mv2.jpg)
Stamps inside mask "37" "33"
![Stamp](https://static.wixstatic.com/media/385e75_aef6d22fb2984b18a22c032a6df7841e~mv2.jpg/v1/fill/w_143,h_143,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_aef6d22fb2984b18a22c032a6df7841e~mv2.jpg)
Stamp inside mask "25"
![Rubber stamp](https://static.wixstatic.com/media/385e75_70475cb9e4e243589af287dd7c240433~mv2.jpg/v1/fill/w_147,h_107,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_70475cb9e4e243589af287dd7c240433~mv2.jpg)
Manufacturer stamp on hose "L'ANTIGAZ"
![Rubber stamp](https://static.wixstatic.com/media/385e75_b91417da2cfe4cafb3bc9211705d4573~mv2.jpg/v1/fill/w_147,h_73,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_b91417da2cfe4cafb3bc9211705d4573~mv2.jpg)
Stamp on hose "1939"
![Filter](https://static.wixstatic.com/media/385e75_c9db37505a0c4a9b8424be4b80fc49e9~mv2.jpg/v1/fill/w_147,h_143,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_c9db37505a0c4a9b8424be4b80fc49e9~mv2.jpg)
Filter stamp top view "BREVETE F-39-A"
![Filter](https://static.wixstatic.com/media/385e75_51b1724e68dc4fa5a9fa1cc1f48dd018~mv2.jpg/v1/fill/w_147,h_143,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/385e75_51b1724e68dc4fa5a9fa1cc1f48dd018~mv2.jpg)
Filter inspection stamp side view "Controle D"