Sharp ER-A420 Cash Register
The Sharp ER-A420 cash register is no longer made. A great replacement is the SAM4s SPS-340 cash register which has far more features. There are several other SAM4s models that make great substitutes as well like the SPS-530F just for one. All of the SAM4s models have advanced features that the ER-A420 did not like an SD Card Port and are also available with two station or single station models.