I recently purchased an Ericsson Mouthpiece for the antique KTAS Danish phone I have been refurbishing. It is also perfectly compatible with the antique Danish JYDSK phones. The mouthpiece is an ideal match with the originals in every way except for a seam where the two plastic halves were joined. I don't consider that to be significant, however, to the overall appearance of the finished phone. Very pleased with the mouthpiece, the price and the prompt service from the Old Phone Shop.