The Needham Conversion lock is a standard issue M1861/63 lock that is modified for use in a
Needham Conversion.
The lock is cut and polished below the cut out for the Nipple Bolster. The innards of the lock are exactly the same as the standard issue M1861/63.
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A Standard M1861/63 lock plate
A Needham Conversion M1861/63 lock plate
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