I have to be a little sketchy on this because I’m traveling and have minimal access to my records but here are some quick notes:
H L Savory was founded by Harry Lindsay Savory (1863-1921) sometime between 1885-1890 as an importer and retailer of cigars. William Frederick Hancock was Harry’s early partner in the business but departed in 1896. Savory began manufacturing cigarettes fairly early, and later licensed the brand to a US group in 1907 (this lasted a couple of years before going under). The business continued to operate after Harry’s death in 1921 under the direction of his son Harry Littleton Savory (1902-1977) and, I strongly suspect, Harry’s widow, second wife Lydia Gertrude Savory.
Here the story gets a bit murky and evidence conflicts; one source says Dunhill bought the business shortly after Harry Lindsay’s death in 1921, another says the acquisition was in 1932 when the company had entered bankruptcy. The latter seems much more likely for numerous reasons. In any case the son, Harry Littleton, continued to be involved in the company until the mid-1930s, after which he emigrated from England for good.
I have seen no evidence that the shop sold pipes, let alone manufactured them, before Dunhill purchased the business. It might be true nonetheless but can’t be supported by any information available to me. The earliest proof I have of Savory branded pipes dates to the second half of the 1930s, although someone with a good run of Dunhill catalogs would be able to address this question more authoritatively. Interestingly enough the famous Baby’s Bottom pipe tobacco dates from the same period.
Given the timing of the appearance of Savory pipes in fancy goods brand directories my personal guess, and it’s only that, would be that Dunhill extended the Savory brand to pipes as a means of leveraging its acquisition of a control position of Hardcastle in 1936. This would suggest that Savory pipes began as a product of the Hardcastle factory, not Parker or Dunhill. To repeat this is only theorizing, not assertion let alone fact.