In the same building, downstairs, a year after the commercial launch of the telephone tower in 1887: https://upload.wikimedia.org/wikipedia/commons/e/e8/Allm%C

In the same building, downstairs, a year after the commercial launch of the telephone tower in 1887: https://upload.wikimedia.org/wikipedia/commons/e/e8/Allm%C3%A4nna_Telefonaktiebolagets_f%C3%B6rsta_telefonsal.jpg https://upload.wikimedia.org/wikipedia/commons/e/e8/Allm%C3%...