|
The only unit of weight still defined by a physical object, a platinum bar, is this 1, equal to 2.2 pounds |
a kilogram
|
$500 |
J |
WEIGHTS & MEASURES |
1992-10-01 |
#1854 |
|
The standard for this metric weight is a 2.2 lb. cylinder of platinum iridium alloy kept at the National Institute of Standards & Technology |
a kilogram
|
$200 |
DJ |
WEIGHTS & MEASURES |
1991-06-07 |
#1575 |
|
It was originally intended to be exactly equal to the mass of water in a liter |
a kilogram
|
$800 |
DJ |
WEIGHTS & MEASURES |
1990-09-25 |
#1392 |
|
In the metric system, the weight of 1 liter of water is equal to 1 of these units |
kilogram
|
$600 |
DJ |
WEIGHTS & MEASURES |
1989-01-12 |
#1009 |