00A - 99Z
The earliest of the tubes had just a two digit designation. Things can get confusing with these tubes though as some use a three digit designation with the first digit just used for brand identification. As a general tube, if your tube is the earliest (globe/balloon) shape and it has a three digit number, drop the first digit. So a UX-301A is really just an 01A. Or a 450 is really a type 50.
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On Sale
Tung-Sol USA Type 89 Black Plate BTM Thimble Get Engraved Vacuum Tube 88%
Tung-Sol
Now: $3.16Was: $3.51Tube Type / Number: Type 89 Actual Brand*: Tung-Sol Printed Brand: Tung-Sol Quantity of Tubes: Single Plate Construction: Black Ribbed Getter Construction: Bottom Thimble Country of Manufacture: USA Visible Date Codes: 42097 Lettering Condition: ...Now: $3.16Was: $3.51 -
On Sale
NOS Philco USA Type 89 Black Plate BTM D Foil Get Engraved Vacuum Tube
Philco
Now: $5.18Was: $5.76Tube Type / Number: Type 89 Actual Brand*: Philco Printed Brand: Philco Quantity of Tubes: Single Plate Construction: Black Ribbed Getter Construction: Bottom D Foil Country of Manufacture: USA Visible Date Codes: 70 Lettering Condition: 100...Now: $5.18Was: $5.76