HP 19B teardown part 1

[jebem]

Great work so far, thanks for sharing these excellent photos and information.
This is going to be a truly good reverse engineering work, isn't it?

Many have the background knowledge, but just a few dare to go deep dive into this hobby. I hope to keep learning from you, Eric.
Every time I enjoy your technical presentations (published as video media in YouTube), and of course I can't wait to see the next RPN calculator project alive

As a side note, I can not resist to do a small parody with your sentence:
(...) decapsulation in fuming nitric acid will still be necessary.
I too had my time with plenty of fumes and acid around me as a teenager at school in the hippies golden era. Fortunately I managed to stay away from those harsh environments.
But I couldn't run away from my Master Teacher (Mr. Gomes) in Electricity Workshops classes, where he patiently demonstrated us (the little savages that we where at that time) several techniques to manipulate the materials, including the proper use of some aggressive chemicals.