| Brand | RCA |
|---|---|
| Type | NOS Tube |
| Model | 56 |
| Unit Quantity | 4 |
| Country of Origin | United States |
Check the listing for details. NOS MATCHED QUAD 56 ST GLOBES Engraved Bases Windmill Micas. Condition: Open box, Made in United States. Listed at 125.00 USD. Tubes test NOS. NOS tubes fall within the Gm characteristic range of an average tube, as published in the RCA RECEIVING TUBE MANUAL, which states "Individual tubes, like any manufactured product, may have characteristics that range above or below the values given.