WWII canine gas mask.
https://diqn32j8nouaz.cloudfront.net...k_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...353#post177301
https://www.homemadetools.net/forum/...125#post153646
https://www.homemadetools.net/forum/...034#post140901
https://www.homemadetools.net/forum/...328#post142264
https://www.homemadetools.net/forum/...849#post220538
