Christopher George Bonehill was born in 1831, son of a manufacturing ironmonger. He was apprenticed from about 1844 to 1851 to a Mr Aston (possibly William Aston & Co).
He established his own firm in 1851, but it was only in 1872 that he was recorded at 33 Charlotte Street with a factory in Morville Street.
In 1873 he moved the whole business to the Belmont Firearms Works, Belmont Row. It was probably about this time that the firm were appointed contractors to Her Majesty's War Department.
C G Bonehill was a Guardian of The Birmingham Proof House.
In 1880 he patented a shotgun action and stocks (No.1952).
In 1884 he registered four patents, No. 8469 covered barrels, No. 8471 covered a shotgun, and No.12586 taken out jointly with A J Simpson covered a shotgun.
In 1877 patent No. 3718 covered a shotgun action and in 1878 patent No. 2323 also covered a shotgun action.
In 1888 No.7823 covered double barrel breech actions and safety catches.
In 1895, patent No.12578 with A Tunstall covered a Martini action with a detachable barrel. There may have been another patent for a .22 conversion.
Virtually nothing is known about the firm from about 1900 to 1965 when they closed. Presumably, they contributed to the war effort 1914-1918, and presumably they suffered a lack of business in the period 1920-1935. From 1939 to 1965 they would have seen a gradual decline in business.
From about 1900, C G Bonehill were the main suppliers of rifles to the "Society of Miniature Rifle Clubs". The Society was founded to encourage rifle shooting amongst working class men, and it was largely responsible for establishing smallbore rifle shooting as a sport in England. For this purpose, old .303 Martini-Enfield rifles were re-barrelled to .22 rimfire and sold at very reasonable prices.
The firm were volume suppliers of sporting guns and rifles for export. They produced ball & shot guns and combination guns, and they made the Britannia air rifle. They were pioneers in the mechanisation of gun manufacture, making the "Belmont Interchangeable" shotguns.
To determine the exact value of a CG Bonehill 12 gauge shotgun a couple different things would need to be taken into consideration. Some of these things would include the age and condition of the shotgun.
1910
No published sn data.
I have here what I believe to be the shotgun you are describing. Am trying to pin down further the value. It is a CG Bonehill made for Wells Fargo 20" barrel dbl barrel 12 ga.
Perhaps this wil;l help a little http://www.4-10.freeuk.com/nostalgia21.html
To determine the exact value of a CG Bonehille 16 gauge double barrel shotgun, a few different factors would actually need to be taken into consideration. Some of these things would be the condition and age of the shotgun.
Impossible to say. Mr. Christopher George Bonehill opened his shop as a gunmaker in Birmingham England in 1851 (he was 20 years old). The firm closed in the 1960s, and all records were discarded. Your gun would have been proofed at the Birmingham Proofhouse. An examination of the proofmarks by a collector or gunsmith may be able to give you a range of dates, but for many older guns, there are just no records.
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0.3 cg
10 mg = 1 cg so 295 mg = 295/10 cg = 29.5 cg. Simple!