Am I stupid or is this coin special?

7 posts

Forum »

velocibola

Joined: 3 Aug 2015
Posts: 26

Posted: 3 Aug 2015, 21:50 #

I have this coin from 1960:

I noticed that the circle around the "1" is indented, as for the image I found online, it is not.
Image found online:

What makes my coin special?
Thanks beforehand.

PetrusAscanus

Joined: 22 Nov 2014
Posts: 6304

Posted: 3 Aug 2015, 22:01 #

Non est totum quod splendet ut aurum
Rijkdom bestaat niet uit het hebben van veel bezittingen, maar in het hebben van weinig behoeften

velocibola

Joined: 3 Aug 2015
Posts: 26

Posted: 3 Aug 2015, 22:02 #

Thanks. :/

PetrusAscanus

Joined: 22 Nov 2014
Posts: 6304

Posted: 3 Aug 2015, 22:29 #

Depends on the interpretation of the light direction

Non est totum quod splendet ut aurum
Rijkdom bestaat niet uit het hebben van veel bezittingen, maar in het hebben van weinig behoeften

Essor Prof Catalogue referee

Joined: 13 Apr 2015
Posts: 4745

Posted: 3 Aug 2015, 22:42 #

It's kind of an optical illusion. One time it looks like the opposite of an indented circle, the next time you look it's back to normal again.

Frenchlover Catalogue referee

Joined: 16 Jul 2013
Posts: 13623

Posted: 3 Aug 2015, 23:00 #

The same picture

concave:

Convex:

Referee of south atlantic islands

Geison Translator

Joined: 11 Mar 2015
Posts: 2330

Posted: 16 Aug 2015, 17:20 #

This effect happens everytime I see the picture of this stamped brazilian coin.

My brain hurts.

Forum »

Used time zone is UTC+2:00.
Current time is 21:11.