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Known Errors

Full Bell Lines (FBL)

While not an error, Franklin halves with complete, unbroken horizontal lines on the bottom of the Liberty Bell command significant premiums, especially on key dates.

How to check: Examine the lower portion of the Liberty Bell on the reverse. All horizontal lines should be fully separated, complete, and unbroken.

$15 - $2,000+ depending on date

Doubled Die Varieties

Multiple doubled die varieties documented across the series, with doubling on LIBERTY, IN GOD WE TRUST, or the reverse lettering.

How to check: Use magnification on LIBERTY, the date, and E PLURIBUS UNUM. Look for shelf-like or notched doubling.

$25 - $300

1955 Bugs Bunny Variety

A die clash on certain 1955 Franklin halves left a raised line at Franklin's mouth that looks like buck teeth, earning the nickname 'Bugs Bunny.'

How to check: Look at Franklin's lips on the obverse. A raised die clash line at the mouth creates the appearance of protruding teeth.

$25 - $200

Repunched Mint Mark

The D mint mark shows evidence of being punched into the die more than once.

How to check: Examine the D mint mark above the bell's yoke on the reverse. Look for secondary impressions under magnification.

$10 - $75

Clipped Planchet

A curved clip in the silver planchet caused by overlapping blanking punches.

How to check: Look for a curved indentation along the rim. Check the opposite side for the Blakesley effect (weakness).

$20 - $150

Quick Checks

Frequently Asked Questions

What is the most valuable Franklin half dollar error?

Key date Franklin halves with Full Bell Lines designations are the most valuable, with 1953-S FBL examples worth $500-$2,000+. The 1955 Bugs Bunny variety is worth $25-$200, and major doubled dies can bring $100-$300.

Are all Franklin half dollars silver?

Yes, all Franklin half dollars (1948-1963) are struck in 90% silver. Even common dates are worth approximately $8-$12 for their silver content alone.

What is the Bugs Bunny Franklin half dollar?

The 1955 'Bugs Bunny' Franklin half dollar features a die clash mark at Franklin's mouth that creates the appearance of buck teeth. It is a popular variety worth $25-$200 depending on condition.

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