Jules, don't think the gas mask i saw today was WW1. Strange looking mask, had writing on the back, no date but the script looked 1940's, it was attached to a red canister via a canvas pipe. There may be one coming up soon though. Will post some pics up in a while. I did see a nice group of newspaper cuttings,scrapbook regarding the RFC pilots who shot down the zeppelins,I should have got that. In the meantime will keep eyes open for all the other items as well.