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Ha yep, hard to see past them. Easy to use, light, a lot produced / still available, not the prettiest but not bad lookers. I've got a 1947 ROH build underway and found this letter looking through Cycling in the VCC library (Cycling, Second Series, 1947 01 08 Jan). They are in the 1950 Fonteyn catalogue as 'Stronglight's famous cotterless cranks...' (or something like that) so must have become available again sometime between 1947 and 1950.
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^ and this is why Stronglight invented the square taper bottom bracket in 1933 (!)
Cotterpins are a ballache.
My removal method is similar but I have a block of oak that sits on the floor and supports the crank which has a hole drilled for the pin to get knocked into. A dead-blow hammer is good.