Help Identifying this Tool - Time keeping / navigation?

Hey all, we have this brass reproduction tool marked with a made in Hong Kong sticker on the back. The outer ring has angle measurement from 0-90 degrees. The tool has Roman Numerals on the middle ring, counting 1-12 twice. The very inner piece has abbreviations for each month.

It measures about 4.5" tall & wide.

Curious if anyone has a name for this tool or could tell us more about it. Thanks in advance!

 

I suspect this is a pocket sundial; compare
http://www.stanleylondon.com/HMKalaSunwatchSundial.htm

 

Is that related to a navigational tool, Fakesie?

 

You were right, according to this.
https://www.etsy.com/listing/99396812/sundial-pocket-sunwatch-enjoy-the-sun?

 

No, pretty much sold as a novelty; you can tell time with it, approximately, but it is not accurate enough for actual navigation.

 

See above? You were right!

 

Thank you! I was looking at sundials but didn't see them this similar.

 

My pleasure.

 

And here's a link that shows how to use it. Set your latitude (a link is included to determine your latitude) and the month, aim it at the sun while suspending from the cord.
https://www.pocket-sundial.com/