The Barcelos Rooster
Slide to see more (Below is a picture of what the postcard looks like when you 'slide' the top of the postcard over).
The sender writes:
Greetings from Portugal. I just found this lovely postcard for you. I have never seen anything like it!
(I agree! It is lovely and I too have never seen one exactly like it).
This very unique novelty postcard is from Portugal in 2017.
Here is a video of the postcard 'in action' ...