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History challengemodern

When did these mail services change?

Five postal reforms

guess the exact year of key moments in five postal reforms.

Play through five milestones in British and United States mail services and international postal cooperation. Date public access, a stamp, a treaty, rural delivery and ZIP Codes.

ClassicFive rounds to place events and score as many points as you can.
Play
Duration
5 Rounds
Difficulty
Moderado
Portada editorial generada para una coleccion historica de Histoguessr
Open the timeline and reveal the years

These are the five answer years.

  • 1635: Charles I opens Britain's royal mail service to the public.
  • 1840: Britain issues the Penny Black stamp.
  • 1874: the Treaty of Bern establishing the General Postal Union is signed.
  • 1896: the United States begins its rural free delivery experiment.
  • 1963: the United States introduces five-digit ZIP Codes.
01

context

Before you play

Charles I opened Britain's royal mail service to the public. Britain issued the Penny Black stamp. The Treaty of Bern organised the international exchange of letters. In the United States, rural free delivery was tried and five-digit ZIP Codes were introduced.

02

significance

Why this collection matters

This selection connects five specific changes: who could use the mail, the issue of a stamp, the organisation of international exchange, rural delivery and address codes.

03

guide

Moments that shaped this story

01

Britain's royal mail service opens to the public.

02

Britain issues the Penny Black stamp.

03

The Treaty of Bern establishing the General Postal Union is signed.

04

The United States begins its rural free delivery experiment.

05

The United States introduces five-digit ZIP Codes.

04

questions

Before you start

1Did the General Postal Union change its name?

Yes. The organisation created by the Treaty of Bern later adopted the name Universal Postal Union. The game asks about the signing of the treaty.

2Did rural free delivery begin as a permanent service?

It began as an experiment in three West Virginia communities. It became a permanent service later; the question refers to the start of the trials.

06

transparency

Sources consulted

Automated verification · 2026-10-30T09:04:23.655Z · version 1.