I respectfully disagree with the previous poster -- with those hammering patterns, they are not "Customs", they are indeed the original Zildjian Z line (pre-"Custom"). The splash is a 12" Z splash, and the ride is almost certainly (at that weight) a Z Heavy Power Ride.
The original Z line followed the Impulse line as heavy rock and metal cymbals geared towards louder music (some say in response to the very successful Paiste RUDE line). They were in the product line from 1986 to 1994, when they were replaced by the Z Custom line. The Z Custom line was briefly replaced in 2009 by the Z3 line before the entire line was incorporated into the redesigned A series in 2013.
Original Zs are not easy to find online, possibly because so many of them ended life broken...? In any case, a 20" Z ride in good condition could go for $180-220, a 12" splash for between $50-100. An original Z light power ride is on eBay for $209.99, for basis of comparison.