Hewlett-Packard 419A Null Voltmeter

Orig Cost	Low Bid	High Bid	average
$450.00 (1965-new) $450.00 (1968) $735.00 (1975) $1,175.00 (1980)	.	.	.
$19.99 4/14/02 #1720625691 shipteeks $34.00 4/28/02 #1724579200 rule.woman $39.95 5/23/02 #1731441505 fjpenney $103.50 (+~$18 ship) 7/25/09 #110415374465 sq12tk (3 bids $35 start) (powers up-batteries do not hold charge)

Meter uses the nulling system of measurement to check an unknown input signal. Unit measures from 3 microvolts to 1000 volts DC and from 30 pico amps to 300 nanoamps DC. Units overall size 8 x 7.75 x 6.75 inches. Weight before packing is 8.5 pounds.