SGC is okay for T206's but they don't break them down by factory and PSA has been doing that for years so you can get a pretty good idea on the numbers for the ones that were graded prior to the factory designation.
For example there are 76 Sweet Caporal 350 Steve Evans in their pop report with this breakdown
Sweet Caporal 350 = 76
Sweet Caporal 350/25 = 6
Sweet Caporal 350/30 = 38
There are 32 Sweet Caporal 350's in the pop report that don't have the factory designation but using the 13.63% that the factory 25's represent in the ones that have the factory numbers would put the total around 65-66 factory 30 and 10-11 factory 25's.
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