You Ole’ boys had it easy with calculators. When I did my 7 years day release at Cambridge Tech in the 60s it was log tables or 10” slide rule. Less than 10 years later I found my slide rule as one of the exhibits in the Science Museum in West Ken.
I missed by 1 year the exams where you were allowed log tables and calculators. They still taught us how to use a log table.... Haven't done it once since School. I use a slide rule everyday....
Passed on to me as an apprentice, it was my Grandads and is always kept in the van and still used. Could be 100 years old.
Makita started in 1915 so could be 100 yrs old. Presumably it uses a number of 2v lead acid accumulators in parallel, similar to those used to light gas taps in the old physics lab.....however, I don't think the case is original as it should be in a leather satchel or similar.
Got my Grandad's drill brace same as yours @Birdie. My Dad's Wolf electric drill which is nearly as old as me, I certainly remember him using it in the '70s. A'94 900SS with 72,000 on. Slide rule from school days. I could go on, I'm not a hoarder, but I don't throw it away if it can be mended.