Plastic crystal made in Germany to fit the following Rolex case numbers: 6644, 6545, 6546, 6547, 6548, 6549, 6551, 6553, 6554, 6555, 6557, 6559, 6571, 6744, 6745, 6747, 6748, 6749, 6751, 6753, 6754, 6757, 6771, 66466
Rolex case numbers are located inside the case back and on the side of the case at 12 o'clock position.
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