It sure looks like the Heatons. I probably don’t have that Heaton, but will check. The Similar JABOs are 2004 Classics. I want to put my hands on mine so I can see how close or off my memory of them is.
I have JABO and DAS double ingots. I have one lonely JABO triple ingot. I have a few other oddities including a quad but it is 4 jammed together side by side and not rounded together as 4
Is it 3/4"? It probably is. I am surprised you found that one not attributed correctly as it is a highly prized JABO Peltier Mansion Oxblood Pink Flamingo.
Lutz was confettied on tons of different runs of marbles. I believe that is likely a very oversized marble from a 3/4” run. I can’t pin it down off the top of my head. It may be DAS instead of JABO
I guess it was on 5/1/18 when they made some transparent blue with opaque white 1/2”-5/8” marbles that are almost identical to some made a year earlier. Neither marble making session had a name. On 2/22/17 they did a test run using the Vitro peewee machine that produced transparent blue with opaque white patches and swirls.