The Rico Reloplex was Rico version of the Gregory that was produced from 1955 to 1970.  This particular piece

is perfect if you're trying to capture the classic jazz sound. Many greats played this type of piece with this chamber.

The tip opening is marked "4G" and the serial number is#1776.  The Rico Hollywood has the aluminum banding used on the subsequent Reloplex.  Other than that, it is a Rico Gregory Model A/Master.