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This page contains a listing of all known appearances of the Mento-Helmet.
If you find an Issue this Item appears in that is not shown here, please edit that issue adding "Mento-Helmet" to the Items section of the Appearances.
Chronological Appearances (by Publication)

Title Year, Month
X-Men #13
1965, 09

1965, September

X-Men #20
1966, 05

1966, May

X-Men #33
1967, 06

1967, June

All items (3)

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