Old GE Meters

[ShawnD]

Does anyone know how old these are? 

I bought them from a surplus sale at University in the 90's to get an ammeter with an amps range (My multimeter at the time only went to 200mA).  I think I paid 25¢ each for them.

They are labelled Type DP-9.  The voltmeter is model BDP9VBC1 (3/15/150 VDC) and the ammeter is BDP9ACD1 (1/2.5/10A DC).  They both work and are still accurate compared to a $25 multimeter.  The voltmeter is low resistance (600?/3002?/30020?),  200?/V.  The ammeter burden voltage is 54mV at 1A on the 1A scale.

I love the safety of 150V on an exposed binding post. 

I has to take the cover off the voltmeter to fix the zero adjustment so snapped a few pictures of the insides too.

[radhaz]

Very cool meters. I'm guessing 1940's vintage.