The 2 most obvious changes are the use of different colors (light peach, blue, and green tinting) and removal of the oval frame around Andrew Jackson's portrait.
There are many other more subtle changes including small yellow "20"s printed on the reverse side of the bills.
Please post a new, separate question with the bill's country of origin. None of the major dollar-issuing countries (US, Canada, Australia, New Zealand) print bills with such a high value.
Please post a new question with the bill's country of origin. Neither the U.S. nor Canada, the major dollar-using countries in 1944, issued half-dollar notes at that time - just coins.
The closest you can come to telling the actual age of any US bill is by looking at the Series date on the front. This isn't the actual year the bill was printed, but rather what year the full plate was approved. A series year typically changes only when a major design change is implemented, such as the recent redesigns of the $5-$100 bills, or when the Treasurer's name changes; a new Secretary of the Treasury only rates a letter appended to the series year. Thus a Series 1999 dollar bill may have been printed in 2001.
I paid for the new dress with a one-dollar bill.
The average ONE dollar bill, if new is 6.14 inches long.
my little pony
A series date indicates the year some aspect of the bill was updated. Such changes would be a new bill design, or a new Treasury Secretary. In the case of a date with a letter next to it, that means there was a new U.S. Treasurer, but under the same Secretary. The date is NOT indicative of the year the bill was printed, as it is with coins.
The new $20 bill was released on October 9, 2003
In 2009, Million Dollar Bill is the first track on her new CD I Look To You.
The term "percent dollar bill" isn't meaningful. Please rephrase and post a new question.
The U.S. hasn't made a half-dollar bill in about 150 years. Please post a new question.
$5