"One of my instructors said, "S&W got it right the first time."
I'd say the second time, really.
The original 1896 (I frame) and 1899 (K frame) hand ejectors changed SIGNIFICANTLY in a very short period of time.
By about 1905, though, the guns are pretty what they are today.
A friend of mine has a Model of 1902 I frame .32, and its internals are just... well, the best way I can put it is freaky.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.