First Rolex

[ericandrew]

I bought this recently from a former authorized dealer who originally sold it in the late 70's. It was recently serviced by them and they replaced the crystal and seals and maybe the crown and bezel. It has 5513 between the lugs and serial # of 5.55mil. I place it in the 1978 range.

I would like to get the local experts opinion on what I have. Thank you.