Yes. That ACR product combined a mirror and a whistle - too bad ACR didn't figure out how to combine a signal mirror with their PLB.

Their signal mirror also had great documentation on the back of the mirror.

ACR actually produced a combination survival product for the Gemini and Apollo astronauts in the 1960s that included a flip-out signal mirror with a retroreflective mesh aimer.

Yes, assuming they haven't changed from those I bought over a decade ago[1] (and they do look the same).

They seemed okay as mirrors, but as signal mirrors, I couldn't figure out how to use their red cross & dot for accurate sighting - they didn't seem to do anything useful.

Has anyone had any luck figuring out how to get value out of the CountyComm red cross & dot?

If not, I'd just tape on my own DIY "red-dot" retroreflective signal mirror sight made from red "truck tape"[2] that we've been using for our Operation On Target long distance peak to peak signal mirror event since 2009 - I know those work extremely well, though they can't handle a water dunking.

The advantage of starting with the CountyComm mirror is that they start with a quality mirror, and they've already removed the reflective surface in the center, creating a transparent window. Those are the first two steps when I make a signal mirror from scratch[2], so it is a labor saving - plus they have the lanyard. It's just that their aimer (as far as I can seen) is not greatly helpful.

I just ordered a pair of the CountyComm mirrors (one of each size) just now so I can take another look, but my expectations are low.

[1] These look identical to those they've been selling for over a dozen years - see:
https://www.youtube.com/watch?v=PGq4oKZ0bPA

[2] https://www.youtube.com/watch?v=4aNiJ7fWb9g[i][/i][color:#3333FF][/color]

I got the 2" x 2" BCB "heliograph" (signal mirror) from bladehq.com. It is very light weight and has a real hot spot that works unlike the Countycomm one. They also make a 4x4" model that is harder to find. I want one of those since the sighting hole is in a corner rather than in the center, which should(?) still work perfectly well, and it means you have a mirror useful for other stuff (i.e. looking at yourself) as well.

https://www.bladehq.com/item--Bushcraft-2-Mayday-Signalling--21069

Can get it direct from BCB, but don't know if they do international orders.

https://www.bcbin.com/Catalogue/Products...ELIOGRAPH-CK324

I need to get one of the larger ones made of real glass.

5col has the glass ones. They are heavy (especially the large size) but they are supposed to work really well.

https://5col.com/products/mirror-emergency-signalling-mark-3

[ I overlooked this event until now, because the news stories didn't use the word "mirror" anywhere ]

In July 2001, 13-yr old Boy Scout Cody Clawson was lost south of Yellowstone National Park for 18 hours, including overnight.

In a 2015 interview, Cody said that on the following day, he looked for an open space to signal from, then used his belt buckle as a signal mirror to reflect sunlight to the rescue helicopter.[1]

The rescue helicopter was piloted by Star Wars actor Harrison Ford.

Cody's sun-flashing seems to have been overlooked by the news reporters at the time [2-5], though they captured an exchange that may have alluded to it:

"Boy, you sure must have earned a merit badge for this one," Ford said."
"I already earned this badge last summer," Clawson replied.

Requirement 7(b) for the Wilderness Survival Merit Badge is:
"Demonstrate how to use a signal mirror."

[1] (2015) How Harrison Ford Rescued Wyoming Boy Scout 13 Years Ago

http://web.archive.org/web/20150312161118/https://abcnews.go.com/Entertainment/harrison-ford-rescued-wyoming-boy-scout-13-years/story?id=29465745

[2] CBS News, July 11, 2001
https://www.cbsnews.com/news/harrison-ford-to-the-rescue/

[3] ABC News, July 13, 2001
https://abcnews.go.com/Entertainment/story?id=103690&page=1

[4] Good News, August 30, 2001
https://www.goodnewsnetwork.org/harrison-ford-rescue/

[5] Hello! July 11, 2001
https://www.hellomagazine.com/film/20010712225012/harrisonrescue/