Greetings from London and a questions :)

[KensingtonR]

Hello all :)

Need some help/enlightenment - I was left a 1967 rolex by recently deceased grandfather, and apparently this thing is limited edition, kinda puzzles by it though as to my untrained eye it is a 6548 gold.

What pussles me .. is whan I open the back, old disk thing - is two engravings, on the bust of a figure, the second a number '13' inside of a key. These two engravings are inbetween a rectangle with 0750-18k inside (key on left, figure bust on right. On top of which Roled, Patent etc

If someone could please tell me if this is normal (above paragraph) would be very grateful.