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: omega electroquartz
Useful Output:

Doc 1: Here is a breif History of the Omega Electroquartz f8192 watch. Omega claimed the Beta 21 movement was accurate to 5 seconds per month!
Doc 2: Don't trust Hodinkee? Read an honest owner review of the Omega Constellation Beta 21 Electroquartz from our community of watch enthusiasts.
Doc 3: In this short video we show you the quick way to change the date on the watch.
Doc 4: The Omega Electroquartz f 8192 Hz. The movement is the quartz Cal 1300, the designation Omega gave to their Beta 21 movements. The Beta 21 was developed by
Doc 5: Discover elegance with the Constellation Electroquartz luxury vintage watch made in 1970 - 1976. Find classic vintage watches online at OMEGA®