RCA Number Type 38 #38 Vacuum Tube Valve Engraved Base Shoulder Shape NOS NIB 1st Quarter BW01 They have engraved / hot-stamped

They have engraved / hot-stamped bases

It has 93S6 provenance/date codes

From left to right

Tube One measured 1900/1900 while Tube Two measured 1900/2250 where new/nominal is 2200

56/58 and 64/64

RCA Number Type 38 #38 Vacuum Tube Valve Engraved Base Shoulder Shape NOS NIB 1st Quarter BW01 They have engraved / hot-stampedThis new old stock, new in box RCA number type #38 tube tested to spec on our Paul Hart calibrated TV7 U. BECAUSE OF THE BIZARRE, INTRUSIVE AND DRACONIAN GERMAN PACKAGING REGULATIONS AND THE SEVERE FINES AND PRIVACY INTRUSIONS ASSOCIATED WITH THEM WE NO LONGER SHIP TO GERMAN ADDRESSES. WE WILL HAPPILY SEND YOUR PACKAGE TO A NEIGHBORING COUNTRY OR MAKE SUITABLE ARRANGEMENTS. IN 2021 WE PURCHASED 150,000 VACUUM TUBES. IF IT'S NOT LISTED, WE PROBABLY