Home comic book Superman #140🔍 Superman #140Grade6.0$100.00 CAD In stock Superman #140 quantity Add to cart SKU: ITM719092 Categories: comic book, raw Tags: first appearance, silver age (1956-69), superhero Description Additional information First appearance of blue kryptonite.Grade6.0Related productsFantastic Four #046 $200.00 CADAdd to cartJourney Into Mystery #122 $50.00 CADAdd to cartAction Comics #245 $45.00 CADAdd to cartAction Comics #262 $20.00 CADAdd to cart