You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "What year did Britain's Royal Flying Corps choose watches made by the company who later made the Electroquartz as their official timekeepers?" whose answer is 1917.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did the Royal Flying Corps choose watches as their official timekeepers
Useful Output:

Doc 1: In fact, the British Royal Flying Corps would use Omega watches as the official timekeeper for their combat units, which is a huge honor.
Doc 2: They were the official supplier of the British Royal Flying Corps and U.S Army towards the end of the First World War.  Omega also became the
Doc 3: During World War I, Omega became the official timekeeper for the British Royal Flying Corps in France. After the war, they supplied watches to
Doc 4: Britain's Royal Flying Corps choose Omega watches in 1917 as its official timekeepers for its combat units, as did the American Army in 1918. Omega watches
Doc 5: More than 100 years ago – way back in 1917, to be exact – OMEGA was chosen as the official watch of Britain's Royal Flying Corps combat units.