I've had this for years, and have yet found out what it is. Looks to have been parkerized and maybe painted and one time. Mirror swivels back and forth. High quality glass, and one mark, triangle with an H in it. Posted on the world forum as well, just not sure where it's from. Thanks for any help. Ken 

It's a hand held Atavachron device (Missing it's power plant), a machine where you can view the past to travel back into it, like the vision of Vietnam War we see on your device that's been permanently captured. Below is the standard large version, where a vision of the 18th Century is seen 

Kidding aside LOL, do you think it could be some kind of signaling thing, some kind of heliograph related thing?

Funny patches, love the humor!

Looks like it would slide into something.  Had one guy suggest a microscope mirror, but couldn't find any even close to this type.  I thought maybe so kind of inspection device???

On 9/22/2022 at 11:01 PM, patches said:

It's a hand held Atavachron device (Missing it's power plant), a machine where you can view the past to travel back into it, like the vision of Vietnam War we see on your device that's been permanently captured. Below is the standard large version, where a vision of the 18th Century is seen 

Fascinating. 

On 9/23/2022 at 2:01 AM, patches said:

It's a hand held Atavachron device (Missing it's power plant), a machine where you can view the past to travel back into it, like the vision of Vietnam War we see on your device that's been permanently captured. Below is the standard large version, where a vision of the 18th Century is seen 

AhhhHa....soooooo this is the device some militaria dealers are using to bolster their never ending supply of top shelf militaria collectibles!

😉