Sorry, but no way were ICs and LEDs that advanced in 1965!
The earliest Commodore handheld calculators were released in ~1971. The groundbreaking HP35 was from 1972.
The PR100 was introduced in 1976; I doubt anyone in college would think of 11 years ('65-'76) as "a few years"!
What's the exact calculator model? What's the datestamp on the ICs?
Oops, seems my dates were a bit of kilter here, I must have purchased the SR4912 towards the end of my college days and had the Sinclair scientific in the early days of college. I spent a total of 8 years in college with a gap of a couple of years in between various carry on courses in the progression of the next rung up the ladder to the HND qualification, which also included in that time management courses and training courses as the company was looking to open its own internal college. As regard to the PR100, I never said that I purchased that whilst at college, it was sometime later. The reason why I had to go to CBM offices was because it was not available any longer in the shops and I think I must have got one of the very last ones they made before dropping calculators as I have never seen another one in the same style of case. The ones I had seen were in the same case as the SR4912 and as you see in the accompanying photos, mine was more like a cheese wedge shape all over (chip date on it is 1977).
I attach photos of just some of my collection of calculators and early hand held computers etc, others are in boxes in the garage, cupboards etc.
The PR100 is the last in the sequence and the TI Data Plotter shown for the TI58 I last saw in the garage before it became full up with items from my Mums house clearance so I hope it is still there along with the HP calculators and many others. I'm just as anal with mobile phones, I think I have just about every phone I ever had apart from my very first one which was a brick that my wife got me as a present many years ago from Peoples Phone shop.
![](https://i.imgur.com/oLov2g8l.jpg)