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Product 10/57 Cossor 53KU=CV378 =U54 ~GZ34/5AR4 ,gray anode, brown base, the best!! USD$491.55/per piece Stock : 1 pcs. Status : NOS Box : WB Descriptions : PS.minitary box one sold out. Now in stock 1 pcs NOS ,white box; Cossor CV378 =53KU, for 5U4G, GZ34/5AR4; Cossor made in UK in 1950s , with "K" factory code. The "gray plates and brown base" version ! Very rare and the best! NOS in original military box, perfect conditon! Please look at the photos. Very rare tubes, please email us first to check if the item is in stock before you pay. Current Reviews: 1

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