Question: The M63, is a combat helmet of South African origin, based on the French Modèle 1951 helmet, the M63 replaced the Brodie helmet, a British type, and steel combat helmet designed and patented in London in which year, by John Leopold Brodie?

Context paragraphs:
Modèle 1978 helmet: The Modèle 1978 helmet is a modern military steel helmet used by the French Army under the "F1" designation and commonly called "heavy helmet" (other nicknames include "locomotive skin cap").  It replaced the Modèle 1951 helmet, and is superseded by the SPECTRA helmet.

M63 helmet: The M63 (nicknamed "Staaldak" in Afrikaans) is a combat helmet of South African origin.  Based on the French Modèle 1951 helmet, the M63 replaced the British type Brodie helmets during the early 1960s, and saw extensive use during the Rhodesian and Angolan bush wars.  It was issued until the 1980s when it was replaced by the M87 kevlar helmet.

Modèle 1951 helmet: The Modèle 1951 helmet was a military helmet used by the French military (Army, Navy, Air Force and Gendarmerie), iconic of the Algerian War.  It replaced a variety of helmets used during the Second World War, including the Adrian helmet, Modèle 1945 helmet and American-supplied M1 Helmet.

Brodie helmet: The Brodie helmet is a steel combat helmet designed and patented in London in 1915 by John Leopold Brodie.  In modified form it became the Helmet, steel, Mark I in Britain and the M1917 Helmet in the U.S. Colloquially, it was called the shrapnel helmet, Tommy helmet, tin hat, and in the United States the doughboy helmet.  Worn by Australians during WW2 and sometimes known as Panic Hat.  It was also known as the dishpan hat, tin pan hat, washbasin, battle bowler (when worn by officers), and Kelly helmet.  The US version, the M1917, was copied from the British Mk 1 steel helmet of 1916.  The German Army called it the "Salatschüssel" (salad bowl).  The term "Brodie" is often mis-used.  It is correctly applied only to the original 1915 "Brodie's Steel Helmet, War Office Pattern".

GK80: GK80 (Chinese:GK80钢盔) is a Chinese steel combat helmet first developed in the late 1960s.  Developed as part of a Chinese military aid to Albania in response to the Sino-Soviet split, the helmet was initially designated as the "Type 69" and was only issued in small numbers within the People's Liberation Army.  An improved design was re-designated as the GK80 and was adopted as the standard combat helmet of the PLA in 1980.  The move was part of a PLA modernization program immediately after encountering drawbacks in the Sino-Vietnamese War in 1979, which the PLA realized the necessity to modernize it's arsenal.

M87 kevlar helmet: The M87 is a combat helmet of South African origin manufactured by South African Pith Helmet Industries (S.A.P.H.I) of Rosslyn.  The kevlar composite M87 replaced the steel M63 helmet during the late 1980s, and saw extensive use during the South African Border War, which took place from 1966 to 1989 in South-West Africa (Namibia) and Angola.  It is the current standard helmet of the South African National Defence Force.

American fiber helmet: The American fiber helmet (also known as the American pith helmet, safari helmet, tropical helmet, sun helmet, elephant helmet, or the pressed fiber helmet) is a type of sun helmet made of pressed fiber material that has been used as part of the military uniform by various parts of the United States Armed Forces, from 1934 to present.  As of 2017, the helmet continues to be worn by US military rifle range cadres, as an icon for marksmanship excellence.  The helmet is technically not a pith helmet, insofar as it is not constructed from pith material.  However, in the more generic sense of design style, this type of sun helmet is modeled similarly to one and thus often referred to in common use as a pith helmet.  Additionally, the helmet is not a combat helmet, insofar as it was not originally designed to protect the head during combat.  However, the helmet was nonetheless assigned, at various times in the 1930s and 1940s, as combat gear for use in active theaters.

Mk III helmet: The Mk III Helmet was a steel military combat helmet first developed for the British Army in 1941 by the Medical Research Council.  First worn in combat by British and Canadian troops on D-Day, the Mk III and Mk IV were used alongside the Brodie helmet for the remainder of the Second World War.  It is sometimes referred to as the "turtle" helmet by collectors, because of its vague resemblance to a turtle shell, as well as the 1944 pattern helmet.

SPECTRA helmet: The SPECTRA helmet or CGF Gallet Combat Helmet is the ballistic helmet in use as of 2016 in the French military, and the armies of several other countries.  Built by CGF Gallet (producer of the F1 helmet for firemen), it weighs 1.4 kg , is available in three sizes, and is made from ultra-high-molecular-weight polyethylene "Spectra" fibers, produced under license from Honeywell.  The SPECTRA helmet can stop shell fragments of 1.1 g travelling at 680 m/s , an 80% improvement over the Modèle 1978 helmet it replaced.

M33 helmet: The M33 Helmet ("Elmetto Mod.  33" in Italian) is a steel combat helmet designed in the 1930s in Italy, and was the standard combat helmet of the Regio Esercito up to World War II, and of the Esercito Italiano well into the Cold War.

Supporting paragraphs: M63 helmet Brodie helmet
Answer: 1915