Steve, it has long been my understanding that SBC was the predecessor to SGC. And, as I read it, the July 9, 2020, article in SCD that Lonnie references in his post above seems to confirm this, as follows: "Superlative Baseball Card Certification (SBC) was another one of the original card-grading companies in the 1980s ... SBC ended up selling to coin company NGC, which was owned by the guys who started SGC." I've had this one SBC slabbed card in my colection for as long as I can remember:
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Seeking very scarce/rare cards for my Sam Rice master collection, e.g., E210 York Caramel Type 2 (upgrade), 1931 W502, W504 (upgrade), W572 sepia, W573, 1922 Haffner's Bread, 1922 Keating Candy, 1922 Witmor Candy Type 2 (vertical back), 1926 Sports Co. of Am. with ad & blank backs. Also 1917 Merchants Bakery & Weil Baking cards of WaJo. Also E222 cards of Lipe, Revelle & Ryan.
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