One U.S.Army Signal Corps VT-GM-4-B tube by G.E. with high test ratings. 

This tube was dedicatedly made for the U.S. Army, a rare non-graphite plate tube with much higher Gm rating (see below).

The top mica does not look too white was because the mica was mixed with grey grainy composition.

The label attached to the tube, by the previous owner says "8/19/49 RKE Looks OK, 211 For ET-8010-E VT-GM-4-B".

Tube was tested this week by Amplitrex 1000, at fixed biased mode, and at 500V plate voltage. Test result was 121.5mA plate current (with target current 100mA), and 116%Gm.

This is better than the nominal new tube ratings. 

Note: Shipping to Europe and Asian countries cost almost double for the second pair  in combined shipping, please contact Seller for actual shipping cost before you buy.                                           

SHIPPING: Shipping to USA and Canada with tracking. The shipping rates have been continuing rising during the recent years. If you pay slightly more than the actual rate, I will refund you accordingly. For all other international countries, shipping by airmail but without tracking. 

Please pay in 3 days. Combined shipping is welcome. If you have paid for individual items and have surplus shipping fee paid for, I will refund you immediately when I send out the combined parcel.