research and development lab at the Phuiladelphia Mint produced
dual-dated, 1964 – 2014 Kennedy copper-nickel clad half dollar
prototype test pieces, struck from an obverse based on Roberts’
original higher relief sculptured model that was produced in late 1963.
These prototype pieces bear the dual dates, though that date
configuration will not be used on any of the copper-nickel clad coins
struck for collector sales.
The lab has destruction equipment that permits the test strikes to
be “waffled.” The machinery contains blades that deform the struck
pieces for later metal reclamation.
Security measures are taken to prevent any outside parties who might
be processing the waffled pieces after they leave the Mint from
selling them into the marketplace.