Elvin Jones

Per this Reverb listing, Elvin's drum collection included a 20" handmade cymbal by Roberto Spizzichino.

In this ad from the late 90s, Zildjian reveals the depth of Elvin's involvement in the development of the K Constantinople line of cymbals.

This line was meant to capture the darker "old K" sound of hand-shaped cymbals once made in Zildjian's Turkish factory (referred to as the "K. Zildjian" division) during the early/mid 20th century, as opposed to the brighter, more machined "A. Zildjian" cymbals associated with their American factory's output.

Despite holding a Medium 20" in the ad, Elvin's preference for the 20" "Medium Light" version of this cymbal is confirmed here and here

this Reverb entry, is a good example of Elvin's career-long preference for "K" Zildjian (hand-hammered, originally made in Turkey) cymbals.

per this Reverb entry. Elvin used Turkish and Turkish-style hand-hammered cymbals throughout his career. These authenticated examples are highly consistent with those preferences.

Per this Reverb posting, Elvin's gear collection included a 20" Istanbul Sultan Ride

Per this Reverb posting Elvin's collection included a Zildjian 16" K Dark Crash.