SR 50Model: SR-50 Dismac
Battery: BP 1
Adapter: AC9200
Year: 1974
Chip: TMC0501 / 0521
Manual:

Info: Fellow calculator collector Marie Lisa Collas surprised us in December 2015 with this unusual looking SR-50manufactured for Dismac Industrial S.A. in Brazil. Texas Instruments changed the appearance of the original dramatically by simply switching the silver colored aluminum bezel from the display frame to the keyboard. Purchased in 2022.