This is an ad from a 1923 catalog for the Signal doorbell transformer by the Signal Electric Mfg. Co. Menominee, Michigan. I'm not sure what the other products look like but it mentions Radio equipment, Medical Batteries, Battery chargers, Telegraph Instruments along with their bells and buzzers. Thanks for looking. Hope you enjoyed these pictures. I'm on the road to recovery and hope all of you are well too. Take care stay safe and be well to all.