The calculator mechanism is mounted in a pressed-metal base pan and has a substantial plastic cover.

The keyboard has provision for eight columns, but only seven are fitted to this model. Note that there are no Zero keys. The accumulator register is just visible behind the keyboard, in front of the rotor on the horizontal mainshaft. Behind the rotor is the printer platen and the paper and ribbon feed mechanisms.

There are only four operator controls (apart from the handle), located along the right-hand side:

• the Total lever (towards the rear), which moves fore-and-aft to select sub-total or total
• the Minus key, which selects subtraction
• the Multiply key, which simply inhibits keyboard clearing to allow multiplication by repeated addition
• the Clear key (to the front), which clears the keyboard and releases the Multiply and Minus keys.

The mechanism is built on a die-cast base about 165 x 285 x 12mm thick (6-1/2" x 11" x 1/2"). There are four vertical side plates of 2.2mm (0.084") steel. The outer side plates have many redundant punchings, and are clearly intended for use on a range of models. The mechanism is quite solidly constructed, with the base and side plates alone weighing over 3 pounds.

The add-and-carry mechanism is located between the innermost side plates. The register control mechanism is on the left-hand side, and the operator controls and interlocks are on the right.

Although of European origin, the machine is a peculiar mixture of metric and Imperial dimensions. The mainshaft is precisely 10mm diameter, several other shafts are 5mm, but others are just as definitely 1/4". Many of the screws appear to be 1/8" Whitworth.