This 1930 short proclaimed to be Warner's Silver Jubilee (25 years-old, and going strong.) And, indeed, it was. The brothers entered the business in 1906, as theatre exhibitors in a converted store in New Castle, Pa. Okay, close enough. They begun making films in 1912, but their first full-blown movie, "My Four Years in Germany", appeared in 1918. They acquired the 40-acre Beesmyer Ranch, on Sunset Boulevard, in 1919.
Their filing of the certificate of incorporation in Delaware on April 4, 1923 (remember this date)signified the legal birth of the company. They acquired the Vitagraph Studio in Brooklyn in 1925, and First National in 1927. (Those who are fond of sticking Vitagraph, Vitaphone and First National on all Warner Bros. films might want to remember the 1925 and 1927 dates.)
And, then, 43 years after their 25th birthday party in 1930 ( listed on this page and can be seen on TCM from time-to-time), Warners tossed themselves a 50th Birthday Anniversary, which, according to most math standards, actually occurred in their 67th year.
Hocus-Pocus and right before our eyes, Warners de-aged themselves seventeen years. And set a bad precedent in doing so, as the current generation in the industry thinks such matters as public records should not be made public and thereby keep them from getting calls to play teen-agers when they are pushing 35.
At least, Warners had 1923 as their incorporation birth-year to back up their claim of only being fifty in 1973. That might be the solution for actors to want to shave years...get incorporated...and then you can play teen-agers when you are only two-or-three years old or, at the worst, get turned down for being too young.