“1847” and “IS” Marking on Rogers Brother Silver
The first thing is the 1847 Rogers Brothers Silver is that the 1847 is NOT the manufacturer date. This is the founding date of Rogers Brothers that they include in the hallmark of all their silverware.

The “IS” stands for International Silver who has owned Rogers since 1898.  The Heritage pattern was first introduced in 1953 and continued through 1973

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