Spy coin - photo

[Altair]

Coin used by spies to hide messages during the Hungarian War of Independence (1848-49).

Fullsize image: https://diqn32j8nouaz.cloudfront.net...n_fullsize.jpg



Previously:

Hobo nickels: intricate carvings in coins - GIF and photos
Coin countertop - photo
Polishing a tarnished coin - GIF
Squeeze coin pouch - GIF
Mosaic murrini glass coin - GIF
How to make a coin ring - GIF
Folding coin knife - GIF

[IAMSatisfied]

This 2 Kreuzer coin is about 1.25" dia. x 1/8" thick (31.1mm x 3mm), and gives a reference as to what kind of payload it could conceal.
The following link says that the halves were threaded and screwed together. https://en.numista.com/catalogue/pieces22368.html