This item was failing to work when new batteries were added to it...This would be ideal for those seeking parts or someone that can repair cameras...

Canon’s 312XL-S was not only well received (and well reviewed) but played a significant role in advancing the Super-8 craze of the 70’s. However, it and others in the class had no choice but to sit idly in the coming years with the advent of video.
 
Today however, as you likely know if you are looking at this auction, Super-8s are advancing the craze of vintage cameras as investment opportunities (while now often used as desk or shelf candy), and a 312XL-S in excellent condition such as this one is only going up in value.
 
As per Canon’s website: The 312XL-S was a sister model of the 514XL-S. It had an external metering system, replacing TTL metering, and some functions were dropped from those of the 514XL-S to lower the costs. A newly designed high-speed 3x f/1.2 zoom lens with macro function was applied. This lens had a built-in foldable rubber lens hood.