OK, now on the Fusion drive iMac (HFS+; no APFS). There are no local snapshots: either they're not taken because it's a desktop Mac or because it's not supported by non APFS systems. I suspect the former.
The only time I see snapshots is when cloning the drive to an external HD using SuperDuper! app. The first stage of a SD! backup is the creation & saving of a snapshot.
When booted into ⌘R mode, no local snapshots appear.

Here's a thing about High Sierra Mac laptops with APFS (SSD): you don't need an external drive to perform a Time Machine restoration.
I rebooted my MBA via ⌘R at restart & ran the First Aid aspect of DiskUtility. Mention was made of the existence of nine local snapshots, 6 from the previous day & one each for the previous three days.
-- Each hour, Time Machine takes a snapshot of the whole system and saves it somewhere (only if you have plenty of drive space). When a backup is made to an external drive, these local snapshots are replicated on the external backup. I don't know if they are then cleared from the Mac.
A snapshot is automatically made as the initial stage of a macOS system update.
Now for the interesting part. Under the Restore from Time Machine section, each of these snapshots is recognised as a source for a complete Time Machine restoration. You can also restore missing files if they were deleted any time after a snapshot was taken.
I don't know if that snapshot process works on a hard drive or Fusion drive Mac, though. I'm not even sure if desktop Macs use the snapshot process at all.

Unpleasant weather. I’m down by a beach, catching a slight onshore breeze. Image Image from WTForecast says it all.

Search the web more efficiently with Cake mobile browser for iOS & Android. https://www.imore.com/cake-browser. It finds what you search for. You then swipe between various sources of said search. It’s growing on me, I appreciate its simplicity.

The Berlin Wall existed for 10316 days. Today, Feb 6, 2018 is 10316 days since the head of the East German Communist Party announced that citizens of the GDR could cross the border whenever they pleased.

Novel having a car with two reversing lights. My last one had a reversing light on the passenger side & a super-bright red fog/low visibility light on the driver’s side. I used that fog light twice in five years and that was in really heavy rain at night. Whereas I really would have liked another reversing light on my side.

Wow, just checked the Pnut gallery. It was pretty ferocious.

A box of 100 Twinings teabags weighs in at 200g & costs $11 unless discounted. Daintree tea is a really one, great taste & strength, a little goes a long way. 375g for $17.74 delivered from Queensland to Melbourne is a pretty good deal.

I used to be able to buy Daintree brand tea in the supermarkets but now you have to go directly to the grower/packager's website.
There I found a 250 gram bag of leaf tea was $15 including postage. However, for an extra $2.75 I can get the same deal with another 125 gram bag of tea added.
I used the last of my supply of Daintree Tea a week ago.

Weird. Downloaded a YouTube video of 3 min 16 sec length at 1080p quality using the y2mate process (add pp to the URL between youtube & .com, then follow up with the desired download).
It had doubled in length when downloaded and the audio had been stripped from it.
So I tried again, this time choosing 720p. That worked properly.