I bought the rarest calculator machine I've ever seen in front of my modest eyes - ET ULTRA WASHINGTON.  The machine is in EXCELLENT condition. Everything moves smooth like a Rolex although it is very big and heavy.  It measures 14x9x5 inches.

It is a calculator for engineers used many years ago to calculate cement baton. It has two magnifying glasses under which  minuscule numbers that move when I rotate the knobs can be seen.

The plate displays the name of its inventor: Ing. Sabatori Washington Omeglia, from Italy. There are several patent numbers included: 256-295; 609-049; 265-782; 99,074; 72,929 and 78,846.

Leonel Yussim