Vade-Mecum Siera
Here's a few pages containing a document published by the Siera company at the end of the 40's. This contains a documentation about all the models build by this brand, from the beginning until 1947. A view of the cabinet and general characteristics. I don't own any schematic from this brand, but there were similar to Philips models of the same era, exept the tubes: Siera has use Mullard valves for the first models.
These radios has been sold in Françe under the Tenor brand. The models are exactly the same, the type first letter is a «T» in place of the «S» from Siera...
Perhaps this documents can help you to identify your model?
