The era of BBD based delays & chorus appears to have just been very short . Between 1976 and 1983 ?
So this comes from the very end. It appears that pedal companies all released digital based delays in the 1980s killing the demand for the BBDs.
Uses a Reticon SAD4096.... super long delays.
The MCI458p is also an op amp
The CD4013 provides an excellent clock source with their Q and -Q outputs.