It is actually fantastic anachronistic adding machines designed by Andy Aaron. An adding machine is a type of calculator, usually specialized for bookkeeping calculations. Conceptual residing between the abacus and supercomputer, these machines are the products of Aaron’s ‘Back to the future’ type of obsession, a marriage of 70’s era calculator technology, LED display, and old, odd switches in still older wooden boxes. Some have a nautical vibe, some agricultural, others look like they might be magic contraptions - all are unique and ingenious.
At the time when lighting-fast calculation is taken for granted, Aaron’s machine offer deliberate purposefulness to everyday calculation.