Vintage MINERVA Stopwatch 9 Jewels - works!

Vintage MINERVA Watch Co. Official Stopwatch Unadjusted Swiss Nine Jewels FSAR Base Metal 401800 circa 1960s "The only stopwatch with unbreakable coil springs employed in critical wearing areas." "Made in Switzerland - No 620 CL" Original box Original red tag Original tiny cylindrical cardboard protectors Excellent condition, please see photos. Seems to be in perfect working order (see video), although I'm not an expert so I can't guarantee this. Analog Antique Clock Equipment Experiment Finish Line Instrument Mainspring Old School Pocketwatch Pocket Watch Retro Science Stop Watch Test Time Timekeeper Timekeeping Timepiece Tool Unbreakable Watch Vintage