I've got a couple of those in my collection, one in 32, one in 38...
the hand eject is much, much more rare than the auto ejects...
backwards spinning of the cylinder to remove was an Iver Johnson & copys feature ( I have a "secret service special" that removes the same way )... it's been a while since I had mine apart... may have to look at the book, if someone doesn't come on & give the OP in the info needed...
I've heard the hand eject was more popular with those that shot their guns alot, as it provided a longer stroke, & more positive extraction, with less chance of trapping an unejected case under the automatic extractor star...
if I remember correctly, the extractor has to come out before removing the cylinder, but I'm not positive without consulting my book 1st...
is there a screw driver slot on the front of the ejector rod ???