And I guess I'll just put these links here (just in case you've read everything at the Museum of HP Calculators website):
https://sliderulemuseum.com/SRM_Home.htm
https://www.sphere.bc.ca/test/ke-sliderule.html
https://www.sphere.bc.ca/test/pickett.html
One piece of calculation hardware that has always fascinated me is the mechanical integrator. I've seen one once in person - fascinating mechanism:
https://commons.wikimedia.org/wiki/File:Mechanical_integrator_CHM.agr.jpg