Scott wrote: > I believe Tung Sol prints 3223 on some of their > 5814A's. The White paint marking the tube > with 5814 or 12AU7 rubs off but the permanently > marked 3223 remains. Scott's experience matches mine. (His stock of tubes must be far larger, though!) 12AU7WA's and 5814A's from Tung-Sol are highly regarded. Tim.