The Pottin and Kinney Block is at 348-356 High Street.
By 1930 it had become the Jacobson Block.
That block is now two separate modern blocks.
As for firms at that location, there was the Booth Meat Company at 354 High Street.
Sanborn map analysis:
Sanborn 1889 map shows three 4 floor buildings in a row
Sanborn 1949 map shows a 4 floor building with a stone faced facade