What does pin registered mean

[Sover . Wong]

HI Nikon Fans,

Occasionally, I noticed that some F2 and F3 cameras are pin registered, and
the price is about doubled of normal F2s and F3s. Does anyone know what pin
registered means ?

Happy shooting,

Sover

*** This world would be a happier place if everybody could have a Nikon -
Sover Wong 1998 ***