http://www.bbc.co.uk/ahistoryoftheworld/objects/bw0MsbpbSI-YkG1xFkESCA

Picture of the snap tin there with a bit of info.


Just a flat guess, but maybe the dudley, the name used by miners to refer to the water container, was made in Dudley or by a company named Dudley. I'll go 'dig' around that area and will post any info if and when.