Hewlett-Packard 5245L 50MHz Frequency Counter

Hewlett Packard Catalog CostLow BidHigh Bidaverage
$2,950.00 (1965)
$2,450.00 (1968) $3,150.00 (1975)
$5,300.00 (1980)
...
$8.03 (+~$21 ship) 7/19/07 #130133729262 crossedwires (4 bids $4.99 start) (was working)
$27.98 (+~$38 ship) 11/28/10 #150523139938 terril188 (3 bids $19.99 start) (w/5253B-turns on-8 digits shown-5 day warranty)

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    The HP 5245L was an industry standard for over 20 years and is a useful counter even today.
    Measures frequencies from DC - 50MHz.
    Also measures period in the DC - 1MHz range (for single periods) DC to 300kHz (for multiple periods).