Nice, matching new in box pair with large double flashings & matching date codes of CY CY.

Test 4200 38.5 ma & 4300 39.8 ma where 2400 gm is good at 250 volts 

in a Triplett 3444/Westmore 501 laboratory tube analyzer restored and upgraded by Paul Hart.

Please see our other items for more vintage tubes & audio.

Tubes guaranteed to test good or may be returned.

We cannot be responsible for what tubes test in another tester or in your gear at *** plate voltage.

We combine orders for shipping.

We don't change values for customs.  

Thank You.