Lucerne Sport

Lucerne Sport, "Calculator". Produced in 1955. Fine and unusual, stainless steel gentleman's wristwatch with round button chronograph, registers, tachometer and calculator with no return to zero of the chronograph hand. signed R.L. Lapanouse Ltd, three-body, polished, revolving and graduated black and red bezel for the calculator functions, back engraved with a sports car. black with radium-coated Arabic numerals, matte silver auxiliary dials for the 6 hours on the 7 and the 45 minutes on the 11, outer telemeter graduation, concentric, 1/5th second, at the center, spiral tachometric scale. "Bâton" radium-coated hands.