Yeah, I remember the keys were all "clicking" keys. That thing was truly one of the originals! When first out they ran about $300 approx. They banned them at school because they offered too much of an advantage to the wealthy kids, plus they insisted that everyone do all work by hand. Odd thing is, I am the only one out of family and friends here who can still extract square and cube roots on paper, use a slide rule to four significant figures, and multiply four by four figures faster than my friends can find the results with calculators!
Many thanks to Sister Mary Elizabeth Shawn and her amazing backhand with a yardstick!