I was reading How to Use the SGC Pop Report in ThatT206life.com and found this:
"1909 Sovereign is always Sovereign 150 and 1910 Sovereign is always Sovereign 350. The same rule holds true for Sweet Caporal, Piedmont, Cycle and American Beauty. A “1910” listing refers to a 350 series back, and a “1911” listing refers to a 460 back."
Thanks Luke!!
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