Including the prototype, 51 Tucker 48 cars were made.
The total is usually given as 51: the original prototype, known as the Tin Goose, plus 50 additional Tucker automobiles assembled from 1947 through the company’s collapse in 1949. The figure is unusually complicated because production did not follow a normal factory run. Thirty-six sedans were completed before the Chicago plant closed, and a small retained workforce assembled 14 more afterward.
The Tucker 48 was the ambitious creation of Preston Tucker. It featured rear-engine layout, independent suspension, a padded dashboard and a central steering-linked headlamp popularly called the Cyclops Eye. The production model was officially the Tucker 48, although the earlier prototype and publicity frequently used the Tucker Torpedo name.
Some references describe 50 completed cars, while others count 51 cars made including the prototype. That apparent discrepancy comes from differing definitions of “completed” and from the prototype’s status. For this question’s explicit wording—“including the prototype”—51 is the accepted total.