amanico[JLC Moderator]
400951
Rolex Explorer II 16570: Two special ones, featuring the same interesting detail.
Indeed, both are rail dial, the cream and the black. While both dials should go in a 16550.
But for a short, very short time, and at the beginning of the 16570 life, those dials can be found.
Here they are:
Cream ( credit Tempus Orologi )

Black ( credit Lunar Oyster )
Very interesting!
Best,
Nicolas