Rung #152 hints and answer

October 29, 2026. Here is the full clue ladder for this puzzle, gentlest first. Each rung is worth fewer points, so open only what you need. The answer stays hidden until you click.

Hint 1, worth 5 points

The most famous one of me, a printing mistake with an upside-down airplane, sells for more than a mansion.

Hint 2, worth 4 points

The world's first of me was black, cost a penny, and wore the profile of a young queen.

Hint 3, worth 3 points

I am sold in sheets and little books at the post office, worth exactly what my corner says.

Hint 4, worth 2 points

Lick my back or peel me modern-style, then press me into the corner of an envelope.

Hint 5, worth 1 point

I am the little sticker that sends your letter anywhere on Earth for pocket change.

Extra hint, the shape of the answer

5 letters, starts with “S”.

Reveal the answer to Rung #152

STAMP

Before stamps, the receiver of a letter paid for delivery, and clever people put secret marks on envelopes so the news arrived free at a glance.

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