My choice would be a 1910 Washington Times Ty Cobb. However, in all the years mighty Mastro offered their glorious resplendent catalogs, just once did I ever recall seeing them offer a Washington Times of Mr. Cobb. It was ungraded, about VERY GOOD. If they had offered another, I suspect I would have noticed that dynamite of a card.
At this point, this prime regional / food piece would likely be considered "a sleeping giant". If and when the next one shows up in a major auction house catalog, I suspect the firm will know, or research what they have before them, and give the piece its due place and prominence.
There may be earlier Ty Cobbs, but who cares? The 1910 Washington Times Ty Cobb has that combination of beauty, scarcity when issued, and being outright devastatingly rare today. These are the ingredients of a greatest score and highlight to any Ty Cobb connoisseur. I take nothing away from the T-3 or the T-206 green. Their owners are most pleased, granted. However, if I owned those two, the one card I'd want to add more than any other Tyrus Raymond is the Washington Times. No, I do not own one; wish I did!
My ten cents worth.
Wishing you well with which ever card you wish to pursue. A Colgan's Chips just came to mind; with this one, at least it is available now and then. A tough obstacle will always be in front of you---at this point most prime specimens of any worthwhile Cobb will be entrenched in a set or a PSA Master Ty Cobb collection. Then again, collections do get broken up.....
---Brian Powell