Congrats on the great new addition! My EB-4L is the only bass I have from that series, but I dug it a ton more than I thought I would..........
I don't know whether or not the EB-0L and -3L were in the 1973 or 1974 catalogs, Jules doesn't have scans of those. But I have definitely seen and played an EB3-L that was said to be a 1974, and the serial number was in the series used from 1973 to 1975.
From the '72 "Bass Place" catalog..........
From the '74/'75 catalog with Peter Cetera on the cover.............
I've never seen anything published between these two catalogs..............
It is still listed in the June1, 1976 price guide, but only as an EB-3. It's listed as short scale..........