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1911 Helmar Stamps (T332) Al Mattern card graded SGC A. This is a baseball issue from the 1911 Helmar Stamps set, manufactured by Helmar Stamps (T332), and encapsulated by Sportscard Guaranty Corporation. The population is 1, with a higher population of 2 noted for the grade. A solid example from the early tobacco-era period, centered on Al Mattern and the 1911 Helmar Stamps issue.
