Hawkes and Son - serial number dilemma

[Highams]

I have a couple also with the 100's prefix numbers, Rick Scwartz is his Cornet Compendium writes;

Known as Hawkes & Co. from 1860 to 1875, the firm was first established in 1860 as an importer of brass instruments in London by William Henry Hawkes (1830-1900), a state trumpet player for Queen Victoria. In 1869, he began to repair instruments, but soon manufactured instruments and sold published music, as well. In the late nineteenth century, the company was one of the most important publishers of brass and military music in the late nineteenth and early twentieth centuries (Newsome 1998, 95).

In 1902, the company bought the tools of "A. Morton & Co., late A. Morton & Sons." In 1924, a one acre factory was opened at Edgware, north London, and three years later, the company employed between 200 and 250 workers. This large producer of brass instruments was bought by BOOSEY in 1930 to form what is known today as "Boosey & Hawkes" (Waterhouse 1993, 165).

Serial numbers for Hawkes & Son: (Myers and Parks 1994, 55, et al.)

(the earliest accessible numbers)

11177 1895-1900

18020 c1900

21993 c1905

27601 1911

39782 c1913

42159 c1920

44368 c1921

45069 c1922

51635 c1925

60626 c1930

CB

[windshieldbug]

I'm just guessing, but is it possible that existing some bells/horns were used, and numbered after the merger?