3 RCA 1S4 Vacuum Tubes NOS NIB Lot Of Three July 08 2025 The 1X2 has been revised

The 1X2 has been revised to "1X2A"

but should be fine in non-critical applications

meaning it was made at the Philips plant in Heerlen

Tube One measured 55 while Tube Two measured 60

This lot of three National Union number / type 58 stamped- / engraved-base tubes was tested on our Paul Hart-calibrated TV7/U for shorts

3 RCA 1S4 Vacuum Tubes NOS NIB Lot Of Three July 08 2025 The 1X2 has been revisedThis lot of three new old stock, new in box RCA 1S4 tubes tested to spec on our Paul Hart calibrated TV7 U. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY PURCHASE PROTECTION COVERS ITEMS