Bulova 1971 Accutron Calendar "CL"
Contained a 301 battery with stepped side down when I obtained it and it was not running. The inside message "use only ACCUTRON 218 installed with stepped side up" was covered by a blank piece of tape. I read somewhere that installing battery with the wrong polarity would damage the watch. Also I looked at many, many photos of Accutron movements and never saw this one. Is the movement original? What is the correct battery and polarity. Is there any way to check for a burned out coil with an ohmeter before installing new battery?