This quarter was certainly struck on a 5-cent blank. Whether it was struck twice is not quite as certain. The abrupt boundary between the normal-looking letters of QUARTER DOLLAR and the stretched-out letters lying just beyond them suggests two strikes with no movement of the coin between strikes. Elsewhere, we just see the normal metal flow one associates with a coin struck once out-of-collar or within a collar larger than the blank. On balance, I'd go with the double strike.
Error coin writer and researcher.