Search:

For future use, a Norton trademark guideline to help determine the age of items that you come across.

264901

For your reference when coming across Norton bench stones;

http://www.nortonabrasives.com/sites/sga.na.com/files/document/Catalog-SharpeningStones-Norton200.pdf

pages 2, 3, 4
...

Somewhere the information that you read on the Norton IB8 (India Bench 8 inch) got lost in translation. I collect them & have many going back to the 40's and before. That stone in the photo is...