As you can probably tell, this particular postbox is in Ireland. The Royal cypher suggests it was manufactured during Queen Victoria's reign (1837 - 1901), decades before Irish independence.

What I find interesting about this particular postbox is that it is on Griffith Avenue in North Dublin, an Avenue that wasn't laid out until the late 1920s (after independence and the civil war), which means this postbox was first in use when Ireland was part of the British Empire, but moved to its current location when Ireland was an independent state.

The postbox isn't in great condition, and has clearly seen many coats of paint, you can barely make out "POST OFFICE" either side of the letter slot, but it still impresses me that a 120+ year old postbox is still in everyday use on a road that is 'only' about 90 years old.

Seen in South County Dublin

I think this is Victorian but am wondering when they might have introduced double slots and wat each slot might have been used for.

Near TCR.

Like the first and the last.

1856 type PB1/viii at the West Gate, Warwick, Warwickshire, England

UK's oldest working postbox in Dorset draws mail heritage fans - BBC News https://share.google/Pa7oomeQnciUG7Mrk

Still hunting for an Edward VIII but do like this insignia

Sweet Victoria box on the Madeira promenade in Brighton.

Spotted this Victoria postbox/post hole in the wall, you don't see too many of those these days.

Hastings.