The BCD decoder was first seen in Mr. Cahn von Seelen’s office back in 2014 or so before I was able to find Mr. Timmer’s contact information in a letter that he had written to Mr. Manfred Walter and which was in the Lectron, GmbH archives that I had photographed initially and then scanned during a subsequent visit. 

    Fortunately, Mr. Timmer had not moved from his home since the 1970’s and with the phone number that I had found, Günther was able to contact the Timmer residence and set up a visit.