Single and 2 Speed Drive Unit Internals?

While I was adding regular trains to this Motor Type Document, I incorrectly referred to the standard drive units from 1987-2014 as "Clam Shells" since that was the closest type in the guide. They look similar to it but are actually different, mainly the gear ratios. The only photos or videos I found that showed either of them opened up was this video at 2:24, but it's not entirely as clear as those that show the "Clam Shell" type (like in this thread). However, I can see the "Clam Shells" are a bit more simplified (only a worm gear on the motor and two conjoined gears) than the standard unit which has a short motor gear, a few more gears, a different switch spring, more weights (in both halves of the casing) and a long, protruding terminal. What I'm looking for are better lit photos of both the single and 2 speed variants that show them in detail, so a more accurate term could be found and all the "Non fiction" trains except the steam engines (C11, C12 and D51) could be moved to it. Since it used to be the standard for almost all trains back then, I don't want it to be referred to as "Shinkansen Type" or similar. Please post them here if you have any.

UPDATE: There is now a thread by Zealot024 that shows the insides of the 2 speed version, with additional closeups provided by Super. Big thanks to both of you, and we'll just have to wait for the single speed variant as well.