This machine belongs to the family of half-automatic models (SEMIS, SEMINA, SEMILO). On these models, a special secondary keyboard, at left, allows to enter the digits for the multiplier, one by one. After each pressure on a key, the product is calculated for the multiplicand multiplied by the key value, added to the “Total Register”, and the carriage is moved one position to the left.
The “XIe TS SEMILO” has a nominal precision of 11-9-16 with an option for 11-9-18. The machine shown here above has such a capacity (11-9-18). This machine has also the split-register mechanism, as described on the “XI MALE”‘s page. And also, it has the “DIV STOP” key, as described on the “VIIe T MISS”‘s page, which was added to all electrical models since the year 1927.To the left of the first column, next to the key “1”, there is a simple device to block the key, while operforming a series of additions. The number of operations is therefore visible simultaneously in the left part of the “Total Register”.