I think the way you've explained it is correct. Here are some pics. The Cranes shifted as well as any RD of the era and both short (28t max cog) and long cage (32-34t max cog) models were produced.

#1





#2





Here's a Crane mounted to a Huret dropout. Photo courtesy of nlerner.

#3





Here's a pic of a Crane I tried to install on a Huret dropout, but as you can see the tabbed washer on the backside of the mounting bolt was in a different orientation than the one above. I'm not sure why this is, but it obviously wouldn't work for my application.

#4





Notice that the one Neal showed (#3) has the tabbed washer in a different orientation than the other three. I concluded by this that the tabbed washer was made to be placed in a different orientation depending on what type of hanger you mounted it to. However, when I removed the circlip to move #4, I didn't find this to be the case and I while I could replace the circlip, I couldn't do it in such a way as to get the same spring tension as the other Cranes I have. I think #4 is just a parts RD now.