i junked a 76 newyorker one time that had a space saver spare.
i can't remember the tire size nor the manufacturer, but the bottle and hold down clamp were very close to the blue color of the hold down shown.
i thought it odd that a C-body would have a space saver spare. the size was larger than an F-78, and as the trunk was very well preserved and the car was a low mileage [20something k, but was junked because of severe rust] piece, it sure looked like the space saver was original to the car.
the wheel was never used so the tire was removed [what FUN that was !] and since the wheel was full size, a full size tire was mounted then used on whatever we had going at the time.