RCA Radiotron Vacuum Tube 4-Pin 2A3 Pair

RCA Radiotron vacuum tube, glass construction, 4-pin specification. This is an unused, stored item (NOS - New Old Stock).
This is the **RCA direct-heated triode tube 2A3**, which boasts enduring popularity among audio enthusiasts.
This item is being listed as part of a house clearance.
The internal plates and filament appear to have no noticeable damage.
The original box has age-appropriate scuffs and damage.
[Regarding Operation]
As I do not have testing equipment or an amplifier for confirmation, this is an unused item sold as-is without tested operation. We await purchases from those who understand vintage items and are looking for maintenance or collection purposes.
[Regarding Shipping]
As this is a very delicate glass product, it will be carefully packed with bubble wrap and shipped in a cardboard box via Rakuraku Mercari便 (Takkyubin).
## RCA
Model Number: 2A3
Construction: Double Plate
Accessories: Original box from the era (Radiotron Red Box)
[Regarding Condition]
The 2A3 printing is clearly visible on the glass surface.
The getter at the bottom retains its silver color, suggesting the vacuum is intact.

- Brand: RCA
- Model: Radiotron
- Type: Vacuum Tube
- Construction: Glass Tube
- Pin Count: 4
- Country of Manufacture: USA

Thank you for looking.