Five additional rare bicentennial quarters valued above $30 million USD and are nearly worth $90 million.

One of the most sought-after bicentennial quarters is the 1976-S silver proof error coin.

This quarter is part of the special silver proof set produced by the San Francisco Mint.

Its rarity and the flawless condition of the few known specimens have propelled its value to an estimated $85 million.

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An exceedingly rare version of the bicentennial quarter is one that inexplicably bears the date "1975" instead of the dual date "1776-1976."

While no quarters were officially minted with the "1975" date, a small number escaped the mint’s stringent quality control.

With only a handful known to exist, their historical intrigue and rarity have catapulted their value to around $80 million.

The rarity of this error, combined with its appeal to error coin collectors, significantly boosts its value.

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