looks like machine doubling, not double die. the length of the beak appears normal. compared to others that year. and wear on the coin.
The beak is normal - there -might- be a very very small 'hit' or contact mark there, but it's nothing, and not an error. You're looking too closely and finding normal things that occur to coins when they are struck, or have contact marks from circulation. I don't mean to discourage you but finding a minor anomaly on a coin is normal - it's a manufacturing process that produces millions of coins on a daily basis - and they don't always look exactly the same - especially after dies strike hundreds of thousands of coins.
....and many here are looking with stereoscopes, instead of 10-15 power magnifying glasses - they're simply looking too closely, and under high power, you see all sorts of things that don't look 'right' - but are normal strikes from dies that produce metal objects at 65-85 tons of pressure EACH time they strike a coin.
It's a normal Quarter that has been circulated. It also may have been a weak strike in that area. Nothing unusual about it.