This is a German army WW2 gas mask and canister. There is also a D stamped on the base.
There are a number of dents and minor rust but the spare lens is included in the lid compartment and the mask has some tears in the seal which will be down to age. The straps are still elastic though. Please feel free to ask any further questions and I will do my best to answer them. This item is in the category "Collectables\Militaria\World War II (1939-1945)\Field Gear".
The seller is "bubbit1989" and is located in this country: GB. This item can be shipped to United Kingdom.