Currency strap

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A currency strap is a simple paper device designed to hold a specific denomination and amount of banknotes. It can also refer to the bundle itself.[1]

In the United States, the American Bankers Association or ABA has a standard for both value and color[2], as shown below. Note that all bills greater than $1.00 only come in straps of 100 count. The colors allow for quick accounting, even when the bills are stacked, such as in a vault.

[edit] History

Bundling money together with a simple elastic or paper device is as old as paper currency itself. However, measured and standardized straps are a relatively new idea. For example, until the mid-70s, The US Federal Reserve counted bills by hand. That is, they employed 55 currency counters whose job it was to count as well as, by touch and feel, authenticate bills.[3]

However, as the amount of currency in circulation increased, they found that they need a more efficient way to count currency. To help the Currency Counting staff keep up, the Bank began strap-sorting the $1 to $20 notes. Straps were visually inspected and weighed against a counterweight equal to the paper mass of 100 genuine U.S. notes. Though this method proved more time efficient, it was not as precise, since some fit currency was classified unfit and destroyed, while some bills that should have been destroyed were returned to circulation.

[edit] ABA Standard (United States)

	Strap Color	Bill Denomination	Bill Count	Total Value
	Black	$1.00	25	$25.00
	Orange	$1.00	50	$50.00
	Blue	$1.00	100	$100.00
	Green	$1.00	200	$200.00
	Pink	$1.00	250	$250.00
	Red	$5.00	100	$500.00
	Yellow	$10.00	100	$1000.00
	Violet	$20.00	100	$2000.00
	Brown	$50.00	100	$5000.00
	Mustard	$100.00	100	$10000.00