Christoph et al,
Having spent an inordinate amount of time trying to find more information concerning tool dealer William Henry Mozley, I think I can fill in some of the blanks. Though significant gaps remain. As a preface, though, I do want to say that the evidence, so far, tends to mostly align with Rob's observations.
As best I can tell, William Henry Mozley was born in Ecclesall Bierlow, West Ridings, Yorkshire, in early 1884. His father, Charles A. was a confectioner in Sheffield and W H appears to have grown up there. By the 1901 census, he was 17 (census says 19) and working as a "cutler, jobbing grinder." The next information I can find regarding him is 1911, when he marries Kate Russell in Hastings and appears in the Sussex/Hastings directory as a partner in the cutlery firm of Buckley & Mozley. (I tentatively believe the partner is Samuel Buckley, born in Sheffield in 1877 & working as a "cutlery warehouse boy" by 1891.) The next earlier directory I've found is 1905, and neither Buckley nor Mozley appear in it under the Hastings listings. So the partnership was formed some time after 1905 and had taken over the 35 George Street location which had previously been occupied by cutlers, Lindsley & Co. The firm continued to be at the 35 George St. location in 1915. By 1918, it had moved to 4 York Buildings, Hastings, an address associated with each iteration of the firm until, at least, 1981.
There is a gap in the information/sources until 1926, when William Henry is sole proprietor of the company, which is located at the 4 York Buildings address. By 1928, it has two locations: 4 York Buildings, Hastings & 47a Seaside, Eastbourne. So, the best I can say at the moment, is that sometime between 1918 and 1926, the partnership dissolved and the company began operating out of the two locations mentioned on Christoph's saw in 1927 or 1928. The firm may have continued with some cutlery manufacturing, but it is always clearly a dealer, only, when it came to tools.
William Henry passed away 8 January 1938 in Hastings, which is also the last date for which I've found evidence of the firm operating at the two locations already mentioned. However, there is, again, a gap in the information/sources, which means that it may possibly have continued using both locations as late as 1945. This, because, the next listing I've found, so far, is from 1946, when only the Hastings address is included. A 1939 registry indicates that his wife, Kate, took over the business after his death, to be succeeded by their son, William Henry Jr. by 1946.
As Indicated earlier, the last entry I've found, so far, for the company is 1981, which, possibly not coincidentally, was the year in which William Henry Mozley, Jr. passed away. Though the firm had added a new second location, The Moor, Hawkhurst, in their listings for 1979 - 1981 and had become a limited corporation around 1960/61.
Hope this has been of some interest, and I'd appreciate hearing from anyone with additional information or corrections to the foregoing.
Don McConnell
Eureka Springs, AR